History YMMV / TerrariaCalamity

** The bosses have become this in recent times; with the advent of more recent mods with high production quality (such as ''Mod of Redemption'', ''Spirit'', and ''Starlight River''), which each have multiple bosses with almost to entirely completely unique AI that make little to no use of vanilla boss AI, Calamity's bosses have come under fire for mostly heavily relying on said AI (notably a large number of bosses that use the Worm AI as a basis). People who defend it make the claim that it helps create bosses, allowing the developers to build on the framework while still making them distinct from vanilla bosses, whilst detractors point out that there are plenty of coders in the community that, over time, have learned to effectively create bosses that break the mold, and in many ways Calamity is holding itself back in this regard. It's worth noting that these mods not only have completely unique bosses, but said bosses often comprise a good portion of the total boss count - however, there are also fair arguments that bosses based on vanilla AI can just as easily be better than those using original AI, and that originality in itself doesn't necessarily make a boss better. Insinuating that Calamity bosses are just retooled vanilla bosses is a major FandomBerserkButton (and will draw the ire of the dev team), so bring it up at your own peril.

** The Brimstone and Cloud Elementals are both loved as well, for similar reasons but the former in particular having a depressing TraumaCongaLine of a backstory.

** Some of the boss' backstories are sad too. A notable example is the Brimstone Elemental's. She and the other elements used to be praised as gods but over time they were forgotten, and then Calamitas shows up to destroy her home and then easily outpowered her, and as a result, she is left in a state of vengeful madness.

** The Storm Weaver, having been born in a time where all of his species minus him and the Devourer of Gods were hunted into extinction. [[PetTheDog The Devourer does help the infant grow up to be stronger than it ever could’ve, though]] (although he wouldn't hesitate to off the Weaver if it grows too strong).
** The Desert Scourge, who was once a mighty sea worm before having its ocean dried up and becoming forced to live in the desert. By the time the player fights it, it's little more than a bloated, dried-up husk in an endless fit of pain and hunger. If one assumes that the lore items are written by Yharim, even he feels pity for the dried worm.
--> '''Death of the Desert Scourge:''' I pitied its very existence. At least you put it out of its starvation-fueled misery.
** The Elementals, having once been revered as gods but ended up forgotten with time. Especially in the case of the Brimstone Elemental, since on top of being forgotten, what was left of her home was then razed to the ground by Calamitas.

** Goozma and Bad Apple --[[labelnote:Explanation]]Upon release of the 1.4.4 port, several videos began appearing showcasing what appeared to be a new secret boss taking the form of the scrapped Goozma. The community was divided on if it was real or not, with even developers giving conflicting information regarding Goozma's legitimacy. On one video, a user asked what Goozma's theme was and what addon it was from, with another user ironically replying with "[[https://www.youtube.com/watch?v=FtutLA63Cp8 Bad Apple]]" in reference to the song. This exchange birthed a misunderstanding where some thought the reply was in reference to what addon Goozma was from, which was blown out of proportion with many users both on Reddit and the Discord seriously believing Goozma was from an addon called Bad Apple. Later on, an addon named "Bad Apple (Goozma boss)" would appear on the game's mod browser containing a [[StylisticSuck low quality parody]] of Goozma, further increasing confusion.[[/labelnote]]
** Yharim and bees[[labelnote:Explanation]]With the lore rewrite, one of the more major plot points is Yharim discovering Draedon's experiments on the Plaguebringers, leading to an argument that results in Yharim cutting ties with him. In context, it's a case of Yharim despising enslavement of innocent creatures, but the way it's worded (especially "Enslaving the bees was despicable") caused many to interpret it as Yharim getting emotional over the deaths of the bees instead, creating the headcanon that Yharim is a diehard bee lover. Not even a day after the release of the updated lore, countless bee-related memes followed.[[/labelnote]]

** The Devourer of gods has a [[https://twitter.com/CalamityModTeam/status/1707086168544710924 new resprite]] in 2023 that is ''Legit freaky'' The new design that's hovering above the old one? '''It's literally that big, and the jaw segment alone has been confirmed to be the size of providence''' . and it was already teased with nightmarish teeth so one can ponder how freaky the final design will be.

** The biggest qualifier would be [[EldritchAbomination The Devourer of of Gods]], a giant all-powerful beast of a ClimaxBoss, possessing [[ThatOneBoss insane levels of difficulty]], but equally insane levels of fun, helped by the ''awesome'' music. It's a colossal multi-phase LightningBruiser like no other, capable of taking nearly any hit for minimal damage while throwing out OneHitKO attacks and flying around at insane speeds, with some [[TrashTalk hilarious banter]] [[DeadpanSnarker coming from the worm]].

* FaceOfTheBand:
** You'd be hard pressed to find someone who will name a boss before either the Devourer of Gods or Calamitas (''especially'' the former) when asked to name a Calamity boss. Hell, the Devourer of Gods is even used as the album cover for the official soundtrack!
** When the Exo Mechs are to be depicted, Ares is generally used to represent all of them as a whole due to it having arguably the most [[HumongousMecha recognizable]] [[DemBones appearance]] among them, such as on the ''Boss Checklist'' mod and even the official wiki.

*** This is no longer as relevant, as Goozma has been officially renamed to Noxus.

** XP-00 Hypnos[[labelnote:Explanation]]Some time after the wiki's migration to wiki.gg, a set of fake pages detailing an [[https://calamitymod.fandom.com/wiki/XP-00_Hypnos Exo Mech version of the Brain of Cthulhu named XP-00 Hypnos]] popped up on the now-defunct Fandom wiki. While raids on the defunct wiki were not unheard of, Hypnos was so well-made that many believed that it was actually real, to the point where any attempts to delete the page were instantly undone. Cue the flood of players flocking to the Discord to ask about Hypnos (both ironically and unironically), and those who knew better like the devs playing along with the joke (in the former case) or working to dispel the misinformation (in the latter). Numerous other fanmade "content" has sprung up from the Fandom wiki's constant vandalization, but Hypnos remains the most well-known one.[[/labelnote]]

* DiscreditedMeme: THE LORDE, especially within the server and DM DOKURO's community, to the point that the joke boss has been removed from the game for real.

** THE LORDE[[labelnote:Explanation]]A RunningGag in the Calamity Mod Discord involving Yharim with googly eyes, that actually [[AscendedMeme became a real boss]]. However, at this point, it has become a DiscreditedMeme within the server.[[/labelnote]]

** DM DOKURO's decision to leave the Calamity team was (and still is) a source of sadness for much of the community, since his works are widely considered to be one of the most appealing things about the mod. It gets even worse if one knows his history with the Calamity fandom and its rampant toxicity, as well as the fact that he left at least partially because the project (and by extension the fans) was giving him too much stress and sapping his motivation - in a way, it was the Calamity fandom's own fault that the mod lost one of its greatest contributors.

* HilariousInHindsight: Providence, the Profaned Goddess is a LightIsNotGood being whose motive is to cleanse all impurity, can be summoned in the Hallow, and gains power from the sun. Terraria's Journey's End update which was released later introduces the Empress of Light as a BonusBoss, a LightIsNotGood being whose motive is to cleanse all impurity, is summoned in the Hallow, and ''also'' gains extreme power from the sun. As a tribute to this, the ''Rust and Dust'' update released after Journey's End even gave Providence an extra-tough mode during the night, in comparison to the Empress of Light's extra-tough mode during the day.

** Defeating Draedon nets you the [[CoolChair Exo Box]] which, albeit first appearing to be a joke item, quickly becomes by far the most versatile mount in the game. It boasts what is essentially perfect omnidirectional movement with instant acceleration and deceleration, very fast movement speed, the ability to slow down on command (the latter of which is particularly good for precision), and performance that is completely unaffected by the environment. The sheer mobility it offers makes traveling across the world and tackling bosses alike a breeze, and the sheer ease with which it can perform precise dodging gives it the potential to turn [[TheDreaded Supreme Calamitas]] into a joke with some practice.

*** Lampshaded by the "[[https://www.youtube.com/watch?v=oU1tRoaZe4Q& Unofficial]]" theme by Turquoise that served as Supreme Calamitas' temporary theme.[[note]]The melody of the placeholder theme actually made it into ''Stained, Brutal Calamity'' as a cameo.[[/note]]

** You'd be hard pressed to find someone who will name a boss before either the Devourer of Gods or Supreme Calamitas (''especially'' the former) when asked to name a Calamity boss. Hell, the Devourer of Gods is even used as the album cover for the official soundtrack!

** Supreme Calamitas' name is usually shortened to [=SCal=]. She also gets called Cal, or even Clam.

** As for one [[WordOfSaintPaul first given to them by DM DOKURO]], the endgame bosses (Post-Yharon bosses) are often referred to as [[EliteFour "Final Four"]], which consists of [[spoiler:[[MadScientist Drae]][[UltimateBlacksmith don]], [[TheHeavy Supreme]] [[PersonOfMassDestruction Calamitas]], [[BigBad Yha]][[EvilOverlord rim]], and [[ChaosIsEvil Noxus]]]].[[note]]This later extended to [[SixthRanger “Final Five”]] when it was revealed by WordOfGod that [[spoiler:[[EldritchAbomination Xe]][[{{God}} roc]] would be the superboss meant to be fought after Noxus.]][[/note]]

** Defeating Draedon nets you the [[CoolChair Exo Box]] which, albeit first appearing to be a joke item, quickly becomes by far the most versatile mount in the game. It boasts what is essentially perfect omnidirectional movement with instant acceleration and deceleration, very fast movement speed, the ability to both speed up or slow down on command (the latter of which is particularly good for precision), and performance that is completely unaffected by the environment. The sheer mobility it offers makes traveling across the world and tackling bosses alike a breeze, and the sheer ease with which it can perform precise dodging gives it the potential to turn [[TheDreaded Supreme Calamitas]] into a joke with some practice.

** Draedon Gaming[[labelnote:Explanation]]Draedon is a MadScientist and UltimateBlacksmith who is responsible for most of the technology found in the setting, so many jokes have been made about him putting his genius to use by building absurdly powerful gaming rigs or other pieces of hardware. Became an AscendedMeme in 1.5, where beating him will let you summon an ''Exo gaming chair'' as a mount.[[/labelnote]]
** XP-00 Hypnos[[labelnote:Explanation]]Some time after the wiki's migration to wiki.gg, a set of fake pages detailing an [[https://calamitymod.fandom.com/wiki/XP-00_Hypnos Exo Mech version of the Brain of Cthulhu named XP-00 Hypnos]] popped up on the now-defunct Fandom wiki. While raids on the defunct wiki were not unheard of, Hypnos was so well-made that many believed that it was actually real, to the point where any attempts to delete the page were instantly undone. Cue the flood of players flocking to the Discord to ask about Hypnos (both ironically and unironically), and those who knew better like the devs playing along with the joke (in the former case) or working to dispel the misinformation (in the latter).[[/labelnote]]

** Jungle Dragon, Yharon is painted out to be this as of the release of his second phase's theme. [[DeathSong The lyrics are from Yharon's point of view, how he realizes all he is doing now is stalling his inevitable demise,]] [[DefiantToTheEnd but continuing to fight]] [[UndyingLoyalty for Yharim's sake,]] all the while pondering if the Jungle Tyrant had orchestrated this due to his depression and own catharsis from watching his legacy burn away.

* AuthorsSavingThrow: Over the course of several updates, the mod introduced reactive damage reduction and boss aggression, where bosses would start taking decreased damage if you tried to kill them too quickly relative to an specific timer that varied per boss, and inversely would start entering later phases earlier if you were taking too long. This was unsurprisingly extremely contentious among many players, who decried the addition as an attempt to force players to play exactly how the developers intended, punishing them for fighting bosses freely and artificially enforcing a specific time limit on every boss. Seemingly in response to this, a patch after the Draedon Update completely removed both of them, with reactive damage reduction only remaining as a part of the Nighttime Providence and Daytime Empress of Light battles.

** XP-00 Hypnos[[labelnote:Explanation]]Some time after the wiki's migration to wiki.gg, a set of fake pages detailing an Exo Mech version of the Brain of Cthulhu named XP-00 Hypnos popped up on the now-defunct Fandom wiki. While raids on the defunct wiki were not unheard of, Hypnos was so well-made that many believed that it was actually real, to the point where any attempts to delete the page were instantly undone. Cue the flood of players flocking to the Discord to ask about Hypnos (both ironically and unironically), and those who knew better like the devs playing along with the joke (in the former case) or working to dispel the misinformation (in the latter).[[/labelnote]]

** XP-00 Hypnos[[labelnote:Explanation]]Some time after the wiki's migration to wiki.gg, a set of fake pages detailing an Exo Mech version of the Brain of Cthulhu named XP-00 Hypnos popped up on the now-defunct Fandom wiki. While raids on the defunct wiki were not unheard of, Hypnos was so well-made that many believed that it was actually real, to the point where any attempts to delete the page were instantly undone. Cue the flood of players flocking to the Discord to ask about Hypnos (both ironically and unironically), and those who knew better like the devs playing along with the joke (in the former case) or working to dispel the misinformation (in the latter).[[/note]]

** [[HarderThanHard Malice Mode]] became this shortly after its release. Some consider it to be a solid evaluation of a player's mastery of a boss by making them fight it at its absolute fastest and most aggressive, while others consider it a cheap form of FakeDifficulty that, prior to a patch, also had well-liked items locked behind it. It was contentious among the dev team too, to the point where Malice was removed entirely in 2.0.1.

*** Adding to the above, you can now get an adorably small, young version of her as a light pet.
*** It means something when she got sixth place on two official community polls based on the best bosses.

** The Devourer of Gods is definitely one, as he has one of the [[BestBossEver best boss fights in the game]] with some [[SugarWiki/AwesomeMusic epic music]] and throwing out some hilarious [[TrashTalk trashtalk]] [[DeadpanSnarker throughout the fight]]. He ended up winning ''two'' community polls on both the best boss overall and the best boss mechanics/design.
** Signus, Envoy of the Devourer is catching steam on the Discord for his cool design, interesting lore and being a [[BestBossEver damn fun boss]]. And then there's his [[SugarWiki/AwesomeMusic theme]] that he shares with his fellow Sentinels, [[https://www.youtube.com/watch?v=dt30jWRMjLk "Servants of the Scourge"]], and his section in particular is often regarded as the best between the three.

* FandomBerserkButton:
** As mentioned above, dismissing Calamity bosses as rehashed vanilla bosses does not sit well with the developers nor the fans, and will often lead to arguments of varying ferocity.
** DM DOKURO is often treated as a SacredCow by the fanbase, so bash the mod's soundtrack at your own risk.
** On the same topic, making light of or insulting DM DOKURO's leave of the project is frowned upon, ''especially'' when it's cited by the detractors of the mod to mock it. [[MisBlamed Misattributing the leave to mistreatment by the developers]], making claims that the soundtrack is the sole reason for Calamity's popularity, and insinuating that the new composers [[ToughActToFollow won't live up to DOKURO]] are similar landmines.

* JustHereForGodzilla: Within the fandom, there are some who play because of the lore, while others prefer to PlayTheGameSkipTheStory.

** [[HarderThanHard Malice Mode]] became this shortly after its release. Some consider it to be a solid evaluation of a player's mastery of a boss by making them fight it at its absolute fastest and most aggressive, while others consider it a cheap form of FakeDifficulty that, prior to a patch, also had well-liked items locked behind it.

** Death and ''especially'' Malice Mode make the mod significantly harder and don't offer any real rewards or groundbreaking mechanics like Rage and Adrenaline, making personal challenge the only real reason to play it. The latter is especially egregious as it demands that a player have totally mastered a boss ''and'' overprepared like hell to even stand a chance at killing them on tier, due to the enormous speed and aggression of the enraged bosses.
** Combining any of the 3 advanced modes with [[NumericalHard Master Mode]] will result in a ridiculously unforgiving playthough where enemies have borderline unreasonable amounts of HP and damage on top of their heightened attack patterns, especially since the mod doesn't actively make changes to balance around the stat inflation. The [[EasterEgg For the Worthy]] seed causes so many intentionally unbalanced boss and world changes on top of the stat inflation that it's borderline UnwinnableByDesign. Despite the developers advising against combining these modes (''especially'' Malice), that hasn't stopped players from doing it anyway - or god forbid, combining all of them at once.

*** This is taken UpToEleven by the optional nighttime battle with Providence, which jacks up her power to an insane degree (making taking hits even more punishing), makes her attack patterns even more aggressive, and turns many of her attacks into full-on BulletHell - yet somehow rarely feeling unfair. This battle has further endeared the boss to the playerbase, and most players now consider Providence's night battle to be one of the most exciting and challenging experiences the mod has to offer.

** Combining any of the 3 advanced modes with [[NumericalHard Master Mode]] will result in a ridiculously unforgiving playthough where enemies have borderline unreasonable amounts of HP and damage on top of their heightened attack patterns, especially since the mod doesn't actively make changes to balance around the stat inflation. The [[EasterEgg For the Worthy]] seed causes so many intentionally unbalanced boss and world changes on top of the stat inflation that it's borderline UnwinnableByDesign. Despite the developers advising against combining these modes (''especially'' Malice), that hasn't stopped players from doing it anyway - or god forbid, [[UpToEleven combining all of them at once]].

** For those seeking a challenge, it doesn't get much better (or worse) than DAD (Death-Armageddon-Defiled) Mode[[note]]For reference, this will disable flight, render every hit a OneHitKill, and buff up boss stats and aggressiveness to their peak[[/note]]. DID (Death-Iron-Defiled) is a little more forgiving since you can afford to take more than one hit, but it's still insanely hard since the Iron Heart disables health consumables and regen while making bosses' minimum damage scale with your max health.
** Malice is even more so, as it demands that a player have totally mastered a boss ''and'' overprepared like hell to even stand a chance at killing them on tier, due to the enormous speed increase of the enraged bosses. And Malice can be stacked with Death, Iron Heart, or Armageddon as well [[note]]It also works with Defiled, but multiple developers have stated that this combination will be UnwinnableByDesign, as Defiled strips the mobility that Malice is completely dependent on.[[/note]].

** On the same topic, making light of or insulting DM DOKURO's leave of the project is frowned upon, ''especially'' when it's cited by the detractors of the mod to mock it. [[MisBlamed Misattributing the leave to mistreatment by the developers]] or making claims that the soundtrack is the sole reason for Calamity's popularity are similar landmines.

* BrokenBase:
** As what is likely the most recognizable content mod ''Terraria'' currently has, the mod as a whole is '''rife''' with this. Supporters praise it for its challenging nature, vast quantities of content (especially post-Moon Lord), cool designs, streamlining and polish of vanilla features, and SugarWiki/AwesomeMusic among other things. Detractors hate it for the very same quantities of content causing content bloat (and what some see as a quantity-over-quality approach), significant changes and balancing to vanilla features to suit its own design philosophy, the lack of balancing, overall edginess, the frequent belligerence of the head developer, and many more. And that's only scratching the surface - merely mentioning Calamity in forums or other modded servers will often cause debates of varying levels of ferocity to follow, especially because Calamity is so renowned among Terraria mods that ''any'' mod growing in popularity will inevitably be compared to Calamity by some.

* AuthorsSavingThrow: Over the course of several updates, the mod introduced reactive damage reduction and boss aggression, where bosses would start taking decreased damage if you tried to kill them too quickly relative to an specific timer that varied per boss, and inversely would start entering later phases earlier if you were taking too long. This was unsurprisingly extremely contentious among many players, who decried the addition as an attempt to force players to play exactly how the developers intended, punishing them for fighting bosses freely and artificially enforcing a specific time limit on every boss. Seemingly in response to this, a patch after the Draedon Update completely removed both of them, with reactive damage reduction only remaining as a part of the Night Providence battle.

** As what is likely the most recognizable content mod ''Terraria'' currently has, the mod as a whole is '''rife''' with this. Supporters praise it for its challenging nature, vast quantities of content (especially post-Moon Lord), cool designs, and SugarWiki/AwesomeMusic among other things. Detractors hate it for the very same quantities of content causing content bloat (and what some see as a quantity-over-quality approach), the lack of balancing, overall edginess, the questionable sanity and mental health of the developer, and many more. And that's only scratching the surface - merely mentioning Calamity in forums or other modded servers will often cause debates of varying levels of ferocity to follow, especially because Calamity is so renowned among Terraria mods that ''any'' mod growing in popularity will inevitably be compared to Calamity by some.

*** The aforementioned Reaver Shark nerf (which was promptly undone) became HarsherInHindsight with the vanilla 1.4 update that ''actually'' ended up nerfing the Reaver Shark even harder than Calamity did, by outright removing most of its pickaxe power instead of gating it behind bosses.
** The bosses have become this in recent times; with the advent of more recent mods with high production quality (such as ''Mod of Redemption'', ''Spirit'', and ''Starlight River''), which each have multiple bosses with almost to entirely completely unique AI that make little to no use of vanilla boss AI, Calamity's bosses have come under fire for mostly heavily relying on said AI (notably a large number of bosses that use the Worm AI as a basis). People who defend it make the claim that it helps create bosses, allowing the developers to build on the framework (and many of the bosses, while using vanilla AI, are different enough to be distinct), whilst detractors point out that there are plenty of coders in the community that, over time, have learned to effectively create bosses that break the mold, and in many ways Calamity is holding itself back in this regard. It's worth noting that these mods not only have completely unique bosses, but said bosses often comprise a good portion of the total boss count - however, there are also fair arguments that bosses based on vanilla AI can just as easily be better than those using original AI, and that originality in itself isn't always a boon. Insinuating that Calamity bosses are just retooled vanilla bosses has become a bit of a FandomEnragingMisconception (and will draw the ire of the dev team), so bring it up at your own peril.

* ComplacentGamingSyndrome: Something that the Dev team strongly dislikes. There is a permanent effort made to make it so that no single weapon (vanilla or modded) is the go-to option for dealing with everything. This extends to vanilla changes as well, hence constant rebalancing to vanilla gear and nerfs to nearly all of the most commonly-abused weapons in vanilla (Meteor Armor/Space Gun, Chlorophyte Bullets, the Daedalus Stormbow + Holy Arrows combo, life steal, etc).

** The Worm Mod[[labelnote:explanation]]Calamity is notorious for having an abnormally large amount of Segmented Serpent bosses, with ''8'' of its bosses (Desert Scourge, Perforators, Aquatic Scourge, Astrum Deus, Storm Weaver, Devourer of Gods, Thanatos, Eidolon Wyrm) and a couple of boss assistants (most notably the Cosmic Guardians and Sepulcher) being worm enemies. As such, expect a good chunk of the community to use this phrase to react to worms that get added, or even to talk about worms that were already added.[[/labelnote]]

** '''WHERE IS SUPREME CALAMITAS THEME?! ERRRRRGGHHHH DM DOKURO!!!''' [[labelnote:Explanation]] Stemming from the extremely long period time it took to finish ''"Stained, Brutal Calamity"'', as well as poking fun at the side of the community that constantly hounds Dokuro for highly anticipated tracks. Pretty much everyone and their mother has referred to this joke at least once, and it's brought up multiple times in and out of the Calamity community, much to everyone's chagrin at points.[[/labelnote]]

* AuthorsSavingThrow: Over the course of several updates, the mod introduced reactive damage reduction and boss aggression, where bosses would start taking decreased damage if you tried to kill them too quickly relative to an specific timer that varied per boss, and inversely would start entering later phases earlier if you were taking too long. This was unsurprisingly extremely contentious among many players, who decried the addition as an attempt to force players to play exactly how the developers intended, punishing them for fighting bosses freely and artificially enforcing a specific time limit on every boss. Seemingly in response to this, a patch after the Draedon Update completely removed both of them

* AuthorsSavingThrow: Over the course of several updates, the mod introduced reactive damage reduction and boss aggression, where bosses would start taking decreased damage if you tried to kill them too quickly relative to an specific timer that varied per boss, and inversely would start entering later phases earlier if you were taking too long. This was unsurprisingly extremely contentious among many players, who decried the addition as an attempt to force players to play exactly how the developers intended, punishing them for fighting bosses freely and artificially enforcing a specific time limit on every boss. Seemingly in response to this, a patch after the Draedon Update completely removed timed aggression and made reactive DR exclusive to Malice Mode.

* AuthorsSavingThrow: Over the course of several updates, the mod introduced reactive damage reduction and boss aggression, where bosses would start taking decreased damage if you tried to kill them too quickly relative to an specific timer that varied per boss, and inversely would start entering later phases earlier if you were taking too long. This was unsurprisingly extremely contentious among many players, who decried the addition as an attempt to force players to play exactly how the developers intended, punishing them for fighting bosses freely and artificially enforcing a specific time limit on every boss. Seemingly in response to this, a patch after the Draedon Update is slated to completely remove both.

* EnsembleDarkhorse: While almost all the [[ElementalEmbodiment Ele]][[CuteMonsterGirl men]][[MsFanservice tals]] are darkhorses in their own right, Anahita is easily the biggest one in the game. Helps that she appeals to fans with [[SirensAreMermaids an attractive design]], a [[BestBossEver fun boss fight]] [[DualBoss with help of The Leviathan]], some SugarWiki/AwesomeMusic, very useful drops like the Community and an interesting and tragic backstory that ties in with the Leviathan's backstory. Hell, she even gets to be [[HeelFaceTurn a summonable ally thanks to an accessory]] ''and'' has a useful item that allows you to transform into her. Noteworthy that the latter item had to be [[{{Nerf}} nerfed]] later down the line as well.
** Adding to the above, you can now get an adorably small, young version of her as a light pet.

* FaceOfTheBand: You'd be hard pressed to find someone who will name a boss before either the Devourer of Gods or Supreme Calamitas (''especially'' the former) when asked to name a Calamity boss. Hell, the Devourer of Gods is even used as the album cover for the official soundtrack!

*** Became an AscendedMeme for a while, when the Devourer of Gods' mini-versions were called Another worm boss for a while.

*** No longer as relevant, as Goozma has been officially renamed to Noxus.

* SelfImposedChallenge: For those seeking a challenge, it doesn't get much better (or worse) than DAD (Death-Armageddon-Defiled) Mode[[note]]For reference, this will disable flight, render every hit a OneHitKill, and buff up boss stats and aggressiveness to their peak[[/note]]. DID (Death-Iron-Defiled) is a little more forgiving since you can afford to take more than one hit, but it's still insanely hard since the Iron Heart disables health consumables and regen while making bosses' minimum damage scale with your max health.

* TheyChangedItNowItSucks: A lot of people were not pleased at first when the [[VideoGame/{{CaveStory}} Last Battle Remix]] was announced to be replaced. [[SubvertedTrope Subverted]] nowadays, as [[SugarWiki/AwesomeMusic people love Scourge of the Universe.]]

* ThatOneBoss: Given that the mod is generally seen as a huge DifficultySpike compared to the vanilla game and even many other mods, there are many of these.
** Changes to Vanilla Bosses:
*** Revengeance Eye of Cthulhu hits way harder than usual, and it will enter its second phase at far higher HP to make sure it spends more time in its berserk charging phase, which is now faster and more sporadic. In addition, below a certain amount of HP it will begin spawning more minions and using fast horizontal charges, which can easily catch unprepared players off guard.
*** Eater of Worlds in Revengeance is a fight that can easily take most players off guard. Piercing weapons normally make short work of the Eater, but in Revengeance its segments massively resist piercing weaponry. To make matters worse, it deals far more damage so using fast melee weapons is out of the question. And the icing on the cake is that its head segments now launch cursed flames, which can easily chunk your HP at this point in the game, especially in Death where the debuff now deals doubled damage.
*** Skeletron was already a piece of work in the original game, but Revengeance Mode makes it even worse. Skeletron's stats are pumped through the roof and it can now use several debuffs - his hands in particular can nail you with Marked to turn your damage reduction into butter, which is a problem when Death Mode makes him spawn with ''four of them''. And when his hands are destroyed, he can now start ''teleporting'' every few seconds, firing off a dangerous shotgun blast of bolts every time he does this. Oh, and he ''respawns'' his hands at 1/3 HP.
*** Wall of Flesh in Rev+, who takes the "come prepared or die" aspect of the original fight to its extreme. There isn't much to say except he deals a ''lot'' more damage with all of his attacks, especially with him firing deadlier eye lasers and switching them out for far stronger death lasers below half health. With the increased HP of both himself and his minions, he can easily turn the fight into a battle of attrition where he perforates you with lethal lasers while you try to whittle him down. Oh, and in case you wanted to put some distance between you and the wall, it can dash at you to close the gap.
*** In all difficulties, Destroyer gains a gigantic resistance to piercing weapons, so it's physically impossible to tear it apart with piercing like you would in the original game (especially with the mod's nerfs to Holy Arrows and the Daedalus Stormbow, which were essentially its kryptonite in vanilla, and its massive DR when first spawning so you can't target its coiled segments anymore). In Revengeance, it resists piercing even more by virtue of despawning projectiles after they pierce enough times, and its probes no longer drop hearts. It's also packing a lot more firepower - its contact damage is boosted, and its laser barrages are now far more calculated instead of a fairly randomized spray. And while its fire rate goes down as it nears death, it gradually starts switching out its red lasers with more lethal ones - blue and green lasers that can inflict Electrified and Cursed Inferno, respectively. The icing on the cake is that its mobility increases as its HP gets lower as well, with the worm ''flying'' at half health and gaining charge attacks at low HP.
*** Revengeance Twins takes the conventional way of defeating them and turns it upside down. Normally, the idea is to kill one twin (usually Spazmatism) before the other to stop them both from being in phase 2 at the same time. However, in Revengeance any twin in phase 2 will actually be NighInvulnerable until the other is also in phase 2, forcing you to fight both of them together at their strongest (in addition, they transform earlier to ensure that they enter phase 2 with a large amount of HP). They also get some new attacks to play around with in phase 2 - Retinazer's lasers are more precise, inflict a burn debuff, and gain slight homing properties, while Spazmatism switches its Cursed Flames for a Shadowflame breath that deals much higher damage. And when you bring one twin below 15% HP, it [[TurnsRed enrages]] - Retinazer gains the ability to lunge while firing a storm of homing missiles, and Spazmatism gets ''much'' faster while belching homing shadowflame blasts. And KillOneOthersGetStronger is in effect - solo Retinazer fires nearly solid streams of lasers while still liberally using his missile-spamming dash attack, while solo Spazmatism's fireballs gain ''homing properties''.
*** Duke Fishron was already hard enough, but Rev+ makes it far worse. His durability is pumped through the roof, bolstering his defense, almost doubling his HP, and giving him invincibility between phases which now start earlier - while his damage and speed are also jacked up to insane degrees. Not only does this prolong an already perilous fight, it means that mistakes now cost far more - especially since several of his moves now inflict Marked. His final phase is buffed up as well, since he can now also spawn Cthulhunadoes to cut off your movement and packs new charge patterns, including a ''nonstop dash chain'' when low in Death Mode.
** Calamity Bosses:
*** The Slime God. He's [[WakeUpCallBoss extremely difficult for the point of the game]] that you fight him at and is a large step up in difficulty from any of the bosses fought at the point. The Ebonian/Crimulan Slime Gods are prime examples of [[LightningBruiser Lightning Bruisers]]: they have decent bulk, powerful physical and ranged attacks that inflict devastating debuffs (Weak for the corruption slimes, Cursed for the Crimson slimes), very high mobility, armies of minions that spawn when they're damaged, and the ability to ''split into 2'' at half health. The large slimes will jump all over the place, soaking up hits while dealing ridiculous damage in return using their contact damage, minions, and aerial mines, some of which linger for stupidly long amounts of time and clutter the battlefield. The Core itself isn't as much trouble at first, but it's small and sometimes hard to see in the chaos, not to mention that it can and will take potshots at you to inflict you with [[GravityScrew Distorted]] and [[DamageIncreasingDebuff Marked]], which can really ruin your day if one of the lesser Slime Gods are nearby. In addition, the Core can occasionally possess a larger God, jacking up its stats for a short time and letting it run you down. And depending on which God you kill first, the others will get unique buffs - woe betide you if you kill the Core first, which will turn the other two into even faster [[LightningBruiser Lightning Bruisers]] that practically teleport. And even if you go for the core last, you'll have to deal with its sudden increase in movement speed, teleportation, and spam of deadly aerial mines. Noteworthy is that the Slime God was voted fourth place in a community poll about who was the hardest boss despite being a pre-hardmode boss.
*** Anahita and the Leviathan, albeit being more like an optional BonusBoss, are extremely difficult. It's a DualBoss fight against the GlassCannon Siren who is deceptively fast and hits very hard with both physical and ranged attacks that inflict StatusEffects, and the MightyGlacier Leviathan (which joins the fight once Siren is at 40% health) who is slow but incredibly bulky, takes up most of the screen, and deals ridiculous damage with both rams and boulder shots that shred defense, all while summoning minions. While they're normally fought one at a time, both bosses will become active simultaneously once the Leviathan is brought below 40% HP as well. Managing both bosses and the constant swarm of minions can prove to be extremely difficult, especially since Anahita and the Leviathan cover each other's weaknesses extremely well. Oh, and [[KillOneOthersGetStronger whichever one is the last one alive will become enraged]] (if you're on Death Mode, [[FromBadToWorse they both spawn in their enraged states]]). No wonder they were voted the fifth hardest bosses in the entire game.
*** Calamitas. She's not too bad at first, although she can deal enormous damage and inflict the deadly Brimstone Flames debuff if you aren't careful. However, once you whittle her down enough, she'll summon a devastating HoldTheLine BulletHell that is guaranteed to take you down a few pegs if you aren't prepared, before adding in lightning-fast charges to her previous attacks. The real problem arises when she summons her brothers later on; Catastrophe and Cataclysm are extremely fast, do tons of damage, and use flamethrower/bouncing fire attacks that take up huge portions of the screen. Even if you figure out how to dispatch the brothers, you'll have ''another'' bullet-hell segment to deal with before Calamitas goes berserk and resorts to nonstop ramming.
*** The Plaguebringer Goliath, a LightningBruiser with very high HP, study DR, incredible amounts of mobility (sometimes charging ''diagonally'', something that can trip up players expecting a Queen Bee clone), and a combination of deadly contact damage and extremely powerful projectile spam. Her attacks all inflict the Plague debuff, which can be annoying at best and lethal at worst. She also punctuates her own attacks with waves of deadly minions, which include Plague Seeker swarms, homing missiles that explode, and invincible Plague Mines that deal huge area damage on contact (Expert+). The second part of the fight on Expert+ is even worse, as she now rains down missiles as she charges - not to mention that she'll gradually get stronger as you wear down her health bar.
*** Ravager quickly became this after receiving a massive rework. It has a colossal amount of health, deals stupidly high damage, and has a wide variety of attacks to hammer you with, including fireballs, homing flares, heat-seeking missiles, giant rock pillars, flaming lanterns that shoot fireballs at you, and of course its physical attacks. All of these attacks will usually stack together to make patterns almost impossible to dodge. During its second phase, not only is it capable of terrifyingly fast, predictive jumps to slam down on players, it pulls out a few new tricks - not only is its head also chasing you around and vomiting even more projectiles than usual, you ''permanently have your flight time decreased by 50%''[[note]]And before you even think of it, it disables extra jumps and jump height boosts as well[[/note]], forcing you to stay (mostly) grounded and face the brunt of Ravager's attacks.
*** The Dragonfolly has a decent amount of HP, is blisteringly fast, and deals enough damage to two or three-shot an appropriately geared player on top of having no real pattern to its erratic attacks. Not only can it spawn clones of itself that are just as fast and only hit slightly less hard, it can also summon waves of homing feathers which can either chunk you for a good amount of HP or leave you open to an even more damaging physical blow - to add insult to injury, the feathers inflict Electrified in a fight where you absolutely cannot stop moving. Its final phases are even worse, as although it loses its minion spawning abilities, it'll become even faster while also summoning lightning pillars to restrict your movement.
*** Providence provides a first impression of what the endgame is like in Calamity, and serves as a harsh gatekeeper for many a player trying to get into the post-Moon Lord segment of the game. She is extremely bulky, deceptively fast, and shaves off enormous amounts of health with each attack, using an incredibly wide and varied arsenal of projectiles to harass you with. Her attacks are all tricky to avoid, inflict a potent DamageOverTime debuff, and tend to [[BulletHell flood the screen with projectiles]] (particularly those where she goes stationary and launches a bullet-hell attack), and some of them even use gimmicks to screw you over (such as ''inflicting negative healing to completely ignore armor and invulnerability frames''). As you lower her HP, she'll spam these attacks gradually faster while adding more to her arsenal, like an invincible crystal that rains harmful shards, a devastating WaveMotionGun that would put Moon Lord to shame, or even ''[[DegradedBoss summoning weaker versions of the Profaned Guardians]]'', one of which ''heals her''. And the icing on the cake is that she can inflict a debuff that greatly weakens your flight, in a fight where mobility is likely your best chance at survival. If you fight her at night, you'll get a chance to battle her in an [[UpToEleven even stronger state]] that dials all her stats up to an insane degree and empowers all her attacks, in exchange for dropping exclusive items.
*** Polterghast. While its HP is on the low side, it deals extreme damage very quickly, slams players with a variety of highly lethal debuffs, and liberally spams beams that are rather hard to avoid. Worse still, while the instinctual response to a Plantera-esque boss would be to create a big arena to maneuver around it, Polterghast will actually get substantial attack and speed boosts the less tiles that are around it, meaning that making your arena too big may accidentally turn the boss into a full-on LightningBruiser - especially since it periodically use charge attacks that increases in intensity as it loses HP. Bursting it down is nigh-impossible since it has passive damage resistance that increases as it loses health. Since you have to fight it in the Dungeon and it can sometimes summon itself, you will be limited to a tiny area unless you set up an arena beforehand, and even then one has to be careful since the Polterghast TurnsRed depending on how open the space is. Taken to an absolute head in its final form as the Necroplasm - not only is it over twice as fast as before and able to deliver ridiculously strong melee attacks, now you have to contend with 3 deadly, invincible, mine-shooting Phantoms and a ''clone of the Polterghast'' that will launch coordinated charges with the boss itself.
*** Much like the original Duke Fishron, the Old Duke is a real hair-puller. He takes the Duke's LightningBruiser aspects and turns them UpToEleven - packing high HP, very sturdy damage reduction, lightning-fast speed and ''insane'' damage, on top of flooding the screen with projectiles/hazards and inflicting all manner of StatusEffects on hit. To make things worse, his charge attacks predict player movement, so if you don't make more evasive maneuvers to throw him off he ''will'' hit you. Fortunately, he'll stop to rest every 10 attacks and temporarily drop his defenses to zero, but more often than not the opportunity to attack will be squandered just trying to recover from his prior beatings.
*** The [[ClimaxBoss Devourer of Gods]] is downright ''infamous'' for being this. He's massive, has obscenely high health, moves incredibly fast, and deals insane damage with just about every attack on top of inflicting God Slayer Inferno, ''especially'' upon contact: enough that getting hit by its head in will more often than not result in instant death. Standard worm tactics with piercing weapons? Does next to nothing since anything that's not its head or tail takes next to no damage. Thought you could just build a platform in the sky to deal with it like you did with Destroyer? Well, too bad it doesn't need solid blocks to move. Try and outrun it? Not only does it fire long-ranged laser bursts which occasionally take on unconventional patterns, it will '''always''' be faster than you. Mobility? Neutered since just being near it warps gravity and flight. And it gets taken UpToEleven in Revengeance mode: not only is it even more powerful than before, it can summon Cosmic Guardians at certain HP intervals, which hunt down the player like seeker missiles and deal ridiculous damage on contact (although piercing weapons make short work of them). Still not enough for you? Well, when you beat him down a bit, he summons his Sentinels (albeit weaker versions unless you haven't beaten them yet, and only before you've beaten them once), forcing you to fight them right after each other. Kill those, and he ''comes back'' with even more health, a more unpredictable AI, rapid-fire Godslayer fireballs, a teleporting charge attack, and the ability to turn invisible every now and then to bombard you with ''laser grids''.
*** Jungle Dragon, Yharon. He packs enormous health, shaves off nearly half your health bar with each attack, moves incredibly quickly for his bulk, and punctuates his attacks with gigantic fire blasts, BulletHell style barrages of fireballs, and flaming tornadoes. Not to mention that he limits your space to a small area cut off by flaming pillars, making excessive movement risky. His second phase where he switches out his AI and is even worse, as he'll start spamming all manner of projectiles in tandem with physical blows, and using TeleportSpam as his attacks gradually build in intensity.
*** Supreme Calamitas, whose difficulty is downright notorious in the modded Terraria scene. The moment her fight begins, she'll build her own arena, go invincible, and unleash an omnidirectional, screen-spanning bombardment of ''hundreds'' of fireballs that deal stupendous amounts of damage, sometimes killing players before she even starts combat. Then, you'll have to handle Sepulcher, a large projectile-spamming worm that can only be killed by destroying the 10 deceptively durable Brimstone Hearts in the arena corners - preferably before Supreme Calamitas herself gets a chance to fire off too many attacks (killing the Sepulcher is even harder when one accounts for the fact that it can bodyblock for the Hearts). Then, when you actually fight her, it only gets worse: she's decently tanky, [[LightningBruiser blisteringly fast, deals enough damage to 2 or 3-shot even endgame players]], and spams all manner of projectiles like fireballs and explosive homing blasts which inflict lethal debuffs. Worse still, she'll pull off more tricks as the fight goes on, namely repeats of her first BulletHell survival phase with more projectiles gradually added in, summoning Supreme versions of her brothers, creating invincible Brimstone Monster Orbs that chase players for the rest of the fight, creating dense rings of Soul Seekers to block attacks, and even summoning the Sepulcher again near the end of her fight.
*** Supreme Calamitas' alternate equivalent, the Exo Mechs, are arguably even worse. They're a WolfpackBoss fight against four obscenely powerful bosses that are extremely threatening individually, but will eventually gang up on you and combine their strengths to create an absurdly difficult attacking formation. Artemis and Apollo are two very fast fliers who constantly use evasive maneuvers to dodge incoming attacks while using devastating projectiles and charges, and Thanatos is an enormous worm who unleashes BeamSpam while also only being vulnerable while shooting. Ares is arguably the worst of them all, as it has four weapons that deal massive damage in wide areas, particularly its WaveMotionGun and FantasticNuke that can instantly end you if you're not careful. They're manageable at first, but once all of them start fighting together and pinning you from multiple directions, managing all of them simultaneously becomes a chaotic nightmare where every attack deals massive damage - and there are a ''lot'' of attacks to get hit by. Worse still, all of their attacks lead your movement, so just running away will just get you killed. Although doing enough damage eventually causes the damaged Mech to fight you one on one, they'll enter a second phase when alone which enhances their attacks and gives them new tricks, with the [[KillOneOthersGetStronger final mech left in particular]] going absolutely berserk.

* AuthorsSavingThrow: Over the course of several updates, the mod introduced reactive damage reduction and boss aggression, where bosses would start taking decreased damage if you tried to kill them too quickly relative to an specific timer that varied per boss, and inversely would start entering later phases earlier if you were taking too long. This was unsurprisingly extremely contentious among many players, who decried the addition as an attempt to force players to play exactly how the developers intended, punishing them for fighting bosses freely and artificially enforcing a specific time limit on every boss. Seemingly in response to this, a patch after the Draedon Update removed RDR from the regular game and made it exclusive to Malice Mode, and completely removed reactive aggression altogether.