Fanfic / Fate Revelation Online

Fate Revelation Online by Daniel-Gudman is a crossover of the Sword Art Online universe with Fate/stay night.

Following the events of the Fate route, Ilya is living happily with Shirou and has decided to spend her remaining months enjoying modern media. Shirou is happy to indulge her and has been shanghaied into playing with her in the next big game: Sword Art Online. Things go awry when they are trapped in the game with the other Players but that is not the only complication. Akihiko Kayaba is not only a brilliant game designer, he is also a magus. With the official announcement of the Death Game he implements a Thaumaturgy Patch allowing for Magecraft to be used. In order to figure out his goal, escape alive, and save as many people as possible, Shirou and Ilya are forced to play the game.

Character Sheet in progress.

Tropes found in this fanfiction:

  • 108: The sheer versatility of the skills Shirou has demonstratednote  have come to be referred to by various players, tongue in cheek, as "One of the 108 Special Skills of the Sixth Ranger".
  • Absurdly High-Stakes Game: Same as canon except the only way to die is being physically disconnected; despite Kayaba's warning, defeated Players are used for testing purposes.
  • The Ace: Shirou is considered this due to his skill when it comes to the game's magic and combat systems, as well as discovering Steel early on. Ilya too, because of her knowledge and ability to use Alchemy to make the Sorcery Trait for Mystic Eyes of Binding when it hasn't been unlocked yet. It leaves Argo wondering if they are in league with Kayaba, simply because they know so much.
  • Action Girl: Ilya gets this early on. Asuna too, as per canon.
  • Adorably Precocious Child: The avatar that Ilya originally made for Shirou, deliberately designed to match his real life appearance when younger.
  • Adventure-Friendly World: It was meant to be an MMO, after all. Kirito notes that the only part of the game which isn't friendly is the Thaumaturgy system, whose complex rules, limitations, and eccentricities are too messy and cumbersome for a game.
  • Animal-Eared Headband: Silica, to match her Element and serve as an aid to enter [Mindset of the Beast].
    • The Black Cats used these as a substitute for guild-themed costumes but eventually got rid of them.
  • Animate Inanimate Object: Keita's familiars are furniture that moves around in a cross between doll-making and carpentry.
  • Antlion Monster: The quest-boss on the third floor, [Hungry Antlion]. It even had the ability to leech the MP and HP from others and was considered a raid-class boss. Grimlock explained how to exploit it's Logical Weakness so his party won despite having few members.
  • Artificial Intelligence: Yui, as seen in a chapter. Diabel wonders if Shirou is this or a Ridiculously Human Robot.
  • Audience Participation: Ideas and drafts of chapters are posted to a separate forum allowing critique and discussion by other forum-goers. Some ideas in the story originated from or were modified through these discussions.
    • In the original version of One Snow and Itagaki's deaths, early readers noted that the setup felt heavy-handed and their actions amounted to a "super death flag". The chapter was subsequently revised to make their deaths more unexpected.
  • Awesomeness by Analysis: Shirou's Structural Analysis. He's so good at it that he managed to accidentally go into the system and discover how to make steel.
    • Grimlock. As a magus he has experience and could determine the weakness in a quest-boss' bounded field, as well as point out how they could have killed it instantly with a Curse.
  • Barrier Change Boss: The [Prismatic Duke] Field Boss on the 4th Floor can shift between the various Slime Monster colors and abilities. See Colour-Coded for Your Convenience for details.
  • Big Brother Is Watching: Kayaba is, of course. Only Ilya, who is helping him, and Diabel, who learns through a PM he sent, are aware.
  • Big Damn Heroes: Shirou bolsters his [AGI] stat solely so he can pull this off early on, as his increased speed allows him to quickly reach people in danger.
  • The Blacksmith: After the players become organized enough that the Sixth Ranger is no longer needed, Shirou turns to blacksmithing in order to help people. Lisbeth is rather depressed when she realizes he can easily outdo her when crafting a sword. Also, Grimlock.
  • Black Knight: [Kari-Ya the Fettered] after his One-Winged Angel change.
  • Blob Monster: Slimes.
  • Bloodless Carnage: Due to the game engine, it's merely a red line and blood isn't shown... at first. Averted later on as the graphics upgrade into further realism on the fifth floor.
  • Both Sides Have a Point: Sasha and Diabel disagree over the Boarding School children learning magecraft. Sasha argues that it's a step towards turning them into Child Soldiers participating in the Death Game which has already left some emotionally scared. Diabel counters that he merely wants them to contribute in research role to support the children who are still fighting and paying for their school. Unspoken is his fear that Kayaba may interfere if more players don't participate.
  • Breakable Weapons: Any weapon that takes too much damage breaks.
  • Brick Joke: Yona while testing the Construction Module developed a deep hatred for the wolvesnote  that harassed him, swearing to drop every last one of them into a lava pit. When the content went live it included a "Wolf Trap rule".
  • Can't Catch Up: Argo worried she'd fall further and further behind other Players and as an information broker due to possessing no Circuits. Shirou's intervention alleviated that.
    • Kirito begins worrying about this as players begin to display more and more powerful magecraft while his own starts to lag behind.
  • Cast from Hit Points: Magic Spells will cause a HP penalty if the player cast them beyond their limits. Given that healing spells are one of the most useful and easiest to cast, many players killed themselves early in the game without noticing their HP gauge sapping to zero.
  • Child Soldiers: As Diabel puts it in 14.3, there are children on the Front, Middle, and Rear Lines facing various levels of danger voluntarily. Several children under Sasha's care were originally active players but now suffer from night terrors due to their bad experiences.
  • Chronic Hero Syndrome: Do we really need to say who at this point?
  • Colour-Coded for Your Convenience: The Slime Monsters on the 4th Floor come in all colors of the rainbow: Red, Orange, Yellow, Green, Blue, Indigo and Violet.
  • Crutch Character: Shirou serves as this during the beginning of the game since he is miles ahead of other combatants for the majority of the early boss battles and knows what he's doing as a magecraft-user to a better extent than most others. The fact that both the 1st, 3rd, and 5th (Fake) Boss Battles ended without causalities is because he directly intervened.
    • Ilya herself counts as she knows more about magecraft than anyone else and can easily curbstomp a boss while having a greater capacity than anyone else. She's just more subdued about it.
    • For Griselda's party, Grimlock is cited to know all the information and methods to improve magecraft once you got him talking. His knowledge basically made what was supposed to be a raid-sized boss a very easy kill. Then again, he is an actual magus...
  • Critical Hit: Any damage that would normally be fatal registers as a critical hit, and if it passes a threshold it can severe a limb.
  • Curb-Stomp Battle: The only way to describe the 5th Boss Battle, both of them. Shirou manhandled [Kari-Ya The Fettered] and Ilya completely took apart [Worm Master Zolgen].
  • Cycle of Revenge: Johnny Black intentionally promotes this with Lux after Xaxa kills Rossa, stating that if Lux wants revenge to come at them as a challenge. When asked why he did it by Xaxa, his answer boils down to It Amused Me.
  • Difficulty Spike: As the game progresses, in line with Kayaba's goal of training them to be actual magi, it becomes more difficult. Even something like healing evolves from "Filling HP bar" to "Generating new flesh to stop bleeding" on the Fifth Floor and will require the players to research further, just to survive the later floors.
  • Driven to Suicide: Several players, much like in SAO, have thrown themselves off the edge of Aincrad. Shirou recalls one in specific that he desperately tried to save but was unable to do so.
  • Dungeon Bypass: Ilya's new castle required her to do a long quest to get the keys to it. Her solution was to use her [Mystic Eyes of Binding] to have the NPC trade it instead. She states she does it pretty regularly. And her senior apprentice was the first one to use it that way on-screen - by forcing the NPC to enter into marriage with him.
    • On the 12th Floor the [DDA] uses jetpacks to bypass the complicated bridge and cavern system Kirito is slogging through.
    • Grimlock does the same in 14.4, circumventing a long chain quest by having one of his wife's friends douse for the wife of the missing person and working from that direction.
  • Elemental Crafting: Certain materials used in forging have benefits, like silver against spiritual beings.
  • Elemental Powers: Courtesy of one's elemental alignment. There are the Chinese and Western basics, as well as rare elements:
  • Encounter Bait: [Lure Tinctures] are made using a drop of a mob and lures in specific monsters that eat that mob. Great for grinding.
  • Expy: Several Characters in-game are based on the Matou family: [Agatha] is based on Sakura, [Zolgen] is based on Zouken, and [Kari-Ya the Fettered] is based on a mix of Kariya and Berserker!Lancelot while [Omi the Fool] is Tokiomi.
  • Equivalent Exchange: In accordance to Nasuverse rules due to the crossover nature, you pay for your magecraft no matter what.
  • Fake Boss: [Kari-Ya the Fettered] is this on the Fifth Floor as he's the Field Boss instead of the Dungeon Boss.
  • Fangirl: Silica is this to Shirou being the Sixth Ranger.
  • Fast Ball Special: How Johnny Black and several Orcs get into a [Safe Zone]. He's giddy the entire way.
  • Fate Worse Than Death: Some players are reincarnated as monsters upon their death, to be killed and respawned endlessly in order to further Kayaba's goals, so as to not waste the resources they provide or stir up more trouble in the real world by the multiple deaths.
    • Also rather hilariously subverted. The one player we see subjected to this fate takes his continual reincarnation as a challenge and promptly starts using the new building construction rules to play Dwarf Fortress with his tormentors.
    • Other players are used as test subjects slash specimen for Kayaba Akihiko's experiments, where their very souls are operated upon. Yet others are used as Magic Circuits inside monsters.
  • Fetch Quest: Discussed by Argo, Liz, and Ilya in Chapter 13.4 as a way to keep casual players from mooching high-level weapons from Shirou, a policy adopted by 15.1. The annoyance factor typically associated with this trope is somewhat mitigated once the other players realized that the more effort they invest into collecting their materials, the better quality the final product will be.
  • Functional Magic: Nasuverse style Magecraft:
    • Alchemy: Magecraft that focuses on acts instead of effects, anything done with it tends to be permanent because it's conversion rather than creation.
    • Dousing: A mystery that flowed along the easiest path to what was desired, so in the case of fresh water it was a balance between the largest and the closest aquifer that drew the spell. More often than not, it was performed using a wand or rod as a conduit so that the spell effect could cause a physical effect. Yolko can use her lightning element to feel for electric fields.
    • Druidry: Magecraft centered around the use of nature and a variation of Runes.
    • Formalcraft: Magecraft that uses rituals, it uses circles and draws from mana.
    • Onmyodo: Japanese Magecraft with the use of things native to the east, like Ofuda that can act as a Protective Charm.
    • Runes: Nordic Magecraft using the letters of the Futhark system.
    • Gemcraft: The use of precious stones as a Amplifier Artifact.
  • Gender Bender: Ilya used a male Berserker-esque avatar during the Beta. After its form was reset to match her real body, she kept her [STR]-focused build and now plays like a Cute Bruiser/Pintsized Powerhouse.
  • Genre Savvy: The more dedicated gamers among the Players know how to exploit rules, find shortcuts in quests, and identify potential hazards based on typical game design.
    • Death by Genre Savviness: Itagaki and One Snow realize something is wrong when talking with Zolgen and decide to leave mid-conversation. Zolgen recognizes they've grown suspicious and immediately enters combat mode, killing them.
    • Wrong Genre Savvy: At the same time many Players misinterpret magecraft rules, ignore vital details on the systems as "fluff", and think that the various advantages and disadvantages of specific Players are due to RNG. All of these elements are real world limitations, which means the actual magi have a leg up on the Players.
  • "Gift of the Magi" Plot: Asuna, Itagaki, Lisbeth and Silica have a girls night out that involves following a chain of deals to what they eventually make out is a "Gift of the Magi" Plot. They run out of time on the quest, however, and so never manage to complete it.
  • Hammerspace: As in the original light novel items are stored in an inventory system rather than physically on the Player. Each item has a weight so the Players can only carry as much as their STR allows.
    • In order to "increase realism" Kayaba eliminated one of the inventory tabs in 15.1 which has created fear among players that this trope will eventually be averted.
  • Harmful to Minors: Everyone is a part of the game, meaning even the children are at risk.
  • Have a Nice Death: There are three reoccurring shows for non-canon deaths: Tiger Dojonote , Imouto Dojonote , Kotomine's Church (for Bad Guys)note .
    • The Altar of Serious Businessnote  is a show hosted for actual deaths, primarily those who die mainly to escalate tension.
    • The Alley Cat Alliancenote  is based on the other shows but stands out due to not actually dealing with a character's death. Instead it acts as an outlet for minor characters to vent about being minor.
  • He Is Not My Boyfriend: How Asuna fends off Ilya's teasing remarks about "equipping [Bishounen] (Kirito) as a boyfriend". In response Asuna tries to invoke this trope from Ilya, but the latter innocently says that "Shirou is just her oniichan"... and then her expression makes a 180 and assures Asuna that is not like her and Shirou are related by blood or anything. Cue sputtering.
  • Humble Hero: Shirou and Kirito, as per source material for both.
  • Innocent Innuendo: Chapter 6:2:
    Ilya: "Shirou! I absolutely won't allow you to cheat on me with any other [Guild Leaders]! Hurry up and become mine!"
    Asuna: "Ilya-chan... Couldn't you have phrased that in a less scandalous way?"
  • Item Crafting: Blacksmith and Tailor players create weapons and clothing.
  • Item Farming: Gatherers do this, harvesting to give or sell to other players.
  • Insistent Terminology: NPCs and actual magi are very insistent on using the correct terms and will attempt to correct Players who use the wrong word. Grimlock is especially picky here.
    • Diabel had the name of Sasha's Orphanage changed to "Boarding School". He wants to keep people thinking of the children there as students and not orphans, as that could mess them up even more than they already will be when the game ends.
  • Invincible Hero: Shirou and Ilya's in-game reputations are growing into this. In fact, a minor plot point in the story is the worry that the auto-balancing functions of the Cardinal system will lead to an inversion of Lowered Monster Difficulty and make the game harder for everyone else.
    Shirou: "So it's a choice. Between saving people now and sacrificing people in the future, and sacrificing people now so that people in the future will be safe."
    Diabel: "There is a third possibility. In gamer slang, you could call it the [Nerf Bat]. The rules of the game will beat down the nail that sticks up."
    • This reputation only grows when the game patches them into [Titled Players], with one of the perks being complete exclusion from the auto-balancing system, as its way of solving the issue.
  • Invisibility: Around the 9th Floor there are several versions of this spell running around, but each one has a huge flaw. Foreign prana washes away the invisibility and it only turns what the spell is cast on invisible, so a Invisibility Cloak will appear invisible but show the person beneath it.
  • I Will Punish Your Friend for Your Failure: Subverted when Sasha believes Diabel intends to cut funding from the [Boarding School] if she doesn't go along with what he's suggesting. He points out that he'll simply fire her instead and let Yuiler take over with the [Church Aid Society].
  • Jetpack: By the twelfth floor, the [DDA] have a prototype combined with the Gravity-Reduction magic to completely go over the canyon.
  • Keep the Reward: Argo offers Shirou 50,000 Col for the secret of making Steel, due to the Death Game making it difficult to get information that should have been gleamed off a wiki, but Shirou tells her to keep it as long as it goes in her (free)guidebook. Zig-Zagged, however, as this method also prevents her from making more money by charging others for the information, not that Shirou realizes this.
  • Laser Blade: Shirou and Kirito have a prototype light-saber by 15.3, but it can't cut anything due to a conflict caused by the creation method that can't be solved.
  • Lemony Narrator: The narration for the omake sequences is decidedly more playful than the standard narration, including comments on Saber nearly blowing the special effects budget and protests when the Alley Cat Alliance calls their writer a hack.
  • Let's Split Up, Gang: When one member of the [Sorcery Hunters] suggests doing this, Schmitt points out that's a horrible idea.
    Schmitt: “That sounds most efficient but splitting the party against a horror-themed quest is asking for trouble.”
  • Logical Weakness: The Hungry Antlion had a bounded field that connected its circuit to the field and let it leech Prana from everything in it. Grimlock solution was to simply let it drain as many Mana Potion items as it could handle until it's body couldn't hold anymore. It couldn't limit the amount taken because of the bounded field and was overloaded with prana to the point its body was destroyed, as well as negating its own magic resistance to Curse Magecraft.
  • Lolicon: As Kirito puts it, there are players in SAO with "[Weird Proclivities]". Ilya has no problems playing the bossy loli if it serves her purposes.
  • Loss of Identity: Happens to Shirou if he's not careful when using [Trigger On] before sympathizing with the experience.
  • Mad Scientist: [Slime Breeder] has some shades of this. He's obsessed with slimes, to the point he created both a two-colored and albino slime, as well as the first [Grenades] in the game by refining and purifying their essence.
  • Magi Babble: Given the premise, the more advanced players delve into this more and more.
  • Magic Enhancement: The [Reinforcement] series of spells are the most basic, but there are others.
  • Magical Eye: Ilya and Hexadecimal have [Mystic Eyes of Binding].
  • The Masquerade: Right now, almost everybody still thinks that the Thaumaturgy patch is merely an innovative expansion to the game.
    • Broken Masquerade: Players who know of the existence of thaumaturgy worry this will occur and prompt the Magus Association to kill the players. Kayaba's ultimate goal is to cause this by actually training the players as magi.
  • Mix-and-Match Critters: The familiar system is set up such that body parts from different creatures can be combined to create this.
    • The [Handy Hawks] on the twelfth-floor were Hawks with arms and hands for legs and feet... which they used to fire crossbows and use swords.
  • The Mole: Diabel and the upper echelons of the [Paladins], as well as Argo, Kirito, and Asuna, suspect Ilya of being this. To be fair, they're right for the wrong reasons.
  • Mythology Gag: Ilya dislikes Visual Novels where sloppy writing makes the player think there is a flag for a route that simply doesn't exist. note 
  • Necromancer: One player is called this because he killed NPCs to make them into Familiars.
  • Nice Hat: Subverted. Ilya crafted a helmet with deer-like antlers for Shirou. Everybody but her thinks it looks ridiculous until it gets an upgrade later on.
  • Ninja: The Ninja Guild, [Fuumanin], who serve Diabel.
  • No Arc in Archery: Averted. Arrows follow a trajectory when fired.
  • Noblewoman's Laugh: Ilya, on occasion.
  • Obvious Rule Patch: Cardinal automatically balances gameplay to ensure it remains challenging, leading to concerns that extraordinary players like Shirou will trigger an increase in difficulty. The Titled Player rule patches the auto-balancing feature to ignore such players while continuing to balance gameplay for the majority.
    • The Wolf Trap rule delays placement of structures while outside Safe Areas. This ensures the system can't be exploited to trap or kill enemies, as Yona apparently had been.
  • One-Hit Kill: Had [Moby Roc] targeted any other player but Shirou, they would have been killed. It's explicitly mentioned that if Asuna hadn't slowed it down and he didn't have such a high agility score, he wouldn't have been able to activate [Ribs of Steel] in time and it still took half his health out. A normal player would have been skewered and carried off if still alive.
  • Only Sane Woman: Asuna is this compared to Shirou, Kirito, and Ilya within their group. The key example early on is witnessing Shirou stitch himself up with swords. Shirou is insane enough to do it, Kirito is interested enough to research it, Ilya is indifferent because she's a magus, while from a normal perspective Asuna is the only one freaked out about it.
  • Orphan's Ordeal: Many of the children Sasha has taken in have night terrors, either due to witnessing other Players die or separation from their parents. Diabel was concerned their mental issues would be even worse if they came to identify themselves as "orphans" only to be reunited with their parents, so he has deliberately changed the Orphanage into a Boarding School.
  • Our Zombies Are Different: Zombies are Familiars made from Human Corpses through [Hoodoo Magecraft]. Everything else is [The Dead].
  • Player Killer: Diabel used to be one in the beta test and Ilya was a monster by normal standards, to the point Argo thought the police should keep a lookout.
  • Poison Is Evil: So far, only two people have used poison and both are villains in the making.
  • Power Glows: The Sword Arts, as well as Shirou when he's using Prana Burst.
  • Primal Fear: Yolko's fear of bugs.
  • Red Baron: Shirou's is literally the "Sixth Ranger" because of how he always shows up at the last moment to save the day. It becomes official later on.
  • RPG-Mechanics Verse: Kirito narrates events, even mundane conversations, as if he was in one. Which, y'know, he is.
  • Scarf of Asskicking: Shirou wears a crimson one with his extra low-weight white jumpsuit. He moves and fights so quickly that its red afterimage is sometimes the only thing most people manage to see.
  • Set Bonus: Blacksmiths can assign items to a "set" of armor, which grants a bonus when all slots of the armor are equipped. Multiple pieces can be assigned to the same set, allowing incremental upgrades without breaking the bonus.
  • Shoot the Shaggy Dog: Asuna and her friends took a Chain of Deals quest so a husband could get his wife a present. They determine it's a "Gift of the Magi" Plot but fail the quest due to Zolgen eating the wife. A follow-up quest has the husband going on an epic trek to find his wife only to also get eaten by Zolgen.
  • Shout-Out
    Why? Diabel didn't know. Maybe he was experimenting on their brains to develop Mind Control Software. Maybe he was an egoist who genuinely wanted them to play his game.
  • Shown Their Work: The third floor boss is based off the Mongolian Death Worm.
  • Sixth Ranger: Shirou quickly earns this moniker as a 'outsider' player who speeds from battle to battle, saving parties in distress at the last minute and then vanishes as quickly as he arrives.
  • Soul Jar: Dr. Skull's ultimate goal is to have one of these for himself and become a Lich.
  • Standard RPG Items: Kayaba removed these from the game, but the players themselves can reproduce them using Magecraft. Such as using Ether and Water to create a Mana Potion.
  • Stock RPG Spells: Through Magecraft.
    • Healing Hands: [Cure] spell. As part of the growing realism, it later on works by creating false flesh and gluing it to the wounded flesh to stop bleeding.
    • Status Buff: [Reinforcement] does a general job, and some monsters have their own variations.
    • Status Buff Dispel: One of the bosses could strip players of their buffs, forcing them to be reapplied.
    • Standard Status Effects: The various bosses early in the game have these, such as the Field Boss on Floor 1 could cause Paralysis, and the 3rd Floor boss could poison.
  • Technicolor Toxin: Poisons come in various colors: Red causes Status Debuffs, Green induces Paralysis, and Blue does Damage Over Time.
  • There Are No Therapists: Defied. While Kayaba deactivated Yui's emotional counseling like in canon, the [Mutual Aid Society] has established a system after the Sixth Ranger dragged someone who tried to commit suicide to them and Diabel makes sure anyone in his guild who has lost someone or needs it gets it. Whether or not they accept it is another story.
    • Yui actually has something to do this time around - she serves as a Psychopomp and devises treatment for adversely affected specimen Kayaba experiments upon.
  • Think Nothing of It: Shirou's usual response to those who thank him for saving them.
  • Think of the Children!: Sasha's argument that the children in the [Boarding School] shouldn't be taught magecraft under the assumption that if it became a required course they would be made to help clear the game. Diabel shoots her down by pointing out that not only are there already children on the Front Line, their money helps maintain her school; it could just as easily be spent on giving the Front Line children better gear to protect them.
  • Town with a Dark Secret: By the end of 13.2, the town that was under an Orc invasion ends up being the new headquarters of Laughing Coffin.
    • A town on the 10th Floor where NPCs don't believe in magecraft due to Zolgen using it as a hiding place.
  • Turns Red: Most of the bosses do this once they enter the [Red Zone] during their final health bar. It is an MMO, after all.
  • Useless Useful Spell: [Structural Grasping] is seen as mostly a variation of the [Appraise] skill by most players and thus useless. Kirito and Shirou have used it to great effect in many situations, to the point where Shirou's borders into psychometry after he maxed it out, reflecting his canon/real world abilities.
  • Un-Sorcerer: Argo. She can use the [Generate Od] spell, but she doesn't have any Magic Circuits. Fortunately for her, she ran into the one guy who knows how to [Make One].
  • Yakuza Princess: From her cheerful ruthlessness, Argo thinks Ilya is one in real life. She and Kirito also wondered if Shirou is her bodyguard, given the odd Dark Lady And Black Knight vibe they feel from them.
  • What Measure Is a Non-Human?: NPCs are treated as non-humans, with players manipulating them through Magecraft. Some NP Cs, however, are noted as acting unusually self-aware but these appear to be rare thus far. Now, remember that Nasuverse rules apply here and consider the NPCs as Muggles for the implications . . .
    • Fortunately, not all players totally agree with this mindset and the more extreme examples are generally viewed as being at least a bit shady.
  • Who Writes This Crap?!: During the second Alley Cat Alliance segment the female characters appear wearing Playboy bunny costumes. They quickly fall into lamenting how the hacks writing their segment can only come up with one gag and fall back on cheesecake to cover for it. The writer takes umbrage with this.
  • Will-o'-the-Wisp: Will-o-Wisps are ethereal monsters that are intangible to physical attacks and have a compulsion spell to lure players into the swamps of the Fourth floor, before shanking them with a knife projection.
  • Witch Species: Like in the regular series, Magi like Shirou and Ilya are born, however Kayaba has somehow managed to induce Magic Circuits into most other players, allowing them to use Magecraft.
    • Explained in-series: Supposedly most people are actually latent magi, except their Magic Circuits failed to initialize properly at birth – sort of like being born with a stunted limb. This entire [Death Game] is apparently Kayaba's attempt to both prove this hypothesis, and at the same time correct it in the players as well.
  • Words Can Break My Bones: [The Prismatic Duke] uses this mystery, spreading prana out with each word as a shockwave that acts as a probe to complete a circuit with whoever hears it. It can then send the prana directly into them and cause them intense pain.
  • The Worm That Walks: Zolgen.
  • Zombie Apocalypse: The fifth floor is set with this theme.
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