History Fanfic / ImperiumAscendant

* {{Irony}}: The Ascendant Emperor refers to the Emperor of 40K as the Corpse-Emperor.

** From the Fan Sequel, The IX Legion have "Gabrielian Joints" - Biomechanical Wing stumps that include the organic changes to support and use the extra pair of limbs in a myriad ways. Though easily the most common attachment is a pair of metallic alloy wings which gives the Astartes the power of limited flight, artillery and scouting attachments have been made use of by various organizations within the legion to become a more effective implement of their Primarch’s will.

* BioAugmentation: Not losing the Primarchs at the start, along with having the God-Emperor's "Research Notes" from the future, allows the Astartes to have implants that make them even better than [[SuperiorSuccessor Primaris Marines]]. For Gene-seed alone they instead ''24'' of them; the original 19 gene-seeds of the original Astartes, the extra 3 gene-seeds of the Primaris, and another gene-seed that modifies the bone marrow and is meant to help with mutation issues from Chaos or genetics, and tweaks some of the other Organs in new ways, such as messing with stem cells to allow faster regeneration and even limb/organ regrowth. The final 24th Gene-seed is, however, unique to each Legion, as the Implant is a miniaturisation of the genetic-gifts of the Legion's Primarch:

* EducationMama: The Assai-Matarari fall can sometimes fall into this.

** The II Legion have ''"The Thrumonyx System"'', which connects and modifies the Sus-an Membrane, Larraman's Organ and Mucranoid gene-seeds. This allows the Astartes to produce a hybrid quick clotting, low temperature conductive, chemically and biologically resistant black gel known as "Thurmonxy" (or Onyx) in large quantities to close wounds and protect tissue from the vacuum of space, allowing these Astartes to survive in hard vacuum for far longer than other Legions. The chemical process to create this Thurmonyx, while energy-intensive, also produces oxygen as a byproduct, allowing Astartes with damaged life-support systems to function within the vacuum, and the use of Thurmonyx cells prepares the body for Sus-an suspension if needed so the Astartes can still fight and remain active until they are safe or need to hibernate. Finally, the gene-seed modifies the Sus-an Membrane to give off small amounts of an specific, unique radiation when it is activated, becoming a form of locator for Imperial Sensors to find Astartes lost in space for either rescues or Gland extraction.

* BreakTheHaughty: Ascendant!Magnus gets a brutal lesson in humility due to his over-reliance on Warp Powers, by being forced to fight a Sister of Silence, who is given full permission to kill the young Primarch if need be. It's deconstructed in that while it ''does'' work in breaking Ascendant!Magnus' pride, the methods used disturbs the Emperor greatly as he could end up losing one of his beloved sons if things went wrong. The Emperor decides to prevent this from happening again by making it so that if someone wants to do something similar, they would have to receive explicit permission from himself or Malcador.
* CavalryBetrayal: Eldar arriving at the orbit of a besieged Squat world, asking for artifacts they left with the inhabitants long ago. When the Squats asked for help with the siege in return, the Eldar teleported in, massacred the leaders, and took their passes to the vault containing the artifacts. Without the leaders, the world soon fell.
** They pay for this by destruction of their craftworld, though.
* CombatPragmatist: On Luna, Zaubernax the Chaos Champion expects a honorable duel against a Primarch while his Legion besieges the gates in a bloody meatgrinder. Instead, both he and the gates get an orbital bombardment in the face.

It can also be found [[https://www.fanfiction.net/s/12741827/1/Imperium-Ascendant here]].

** The Legion of ''"The Silver Knights"'' (this timeline's version of the Grey Knights) are this UpToEleven, as they instead have gene-seed hybridisation of ''all Twenty Primarchs'', picking out the strongest anti-Chaos qualities of each and then further enhanced by the Emperor. The Legion is also lead by Eight "Super-Astartes", Perpetuals born from "The Angel's" power, who is the prototype of a Primarch's Soul and an Avatar of Mankind, allowing them to regenerate from any wound and not be killed by most means. These Eight were created by the Emperor to fulfil their lack of a Primarch, using a improved hybrid creation method between the Custodes' and Astartes' creation processes along with the souls of fallen heroes. These Eight "Lord Paladins" are inferior to the Primarchs' might, but still possess immense psychic power and knowledge from hundreds of dead Astartes.

* InSpiteOfANail: Subverted during the Emperor's talk with the last priest. Uriah's talk with the Emperor would've potentially ended the same way as it did in canon: Dying while the last church burns around him (albeit this time by his own doing instead of the Emperor's forces). [[spoiler: Except the Emperor extended his lifespan and saved him while the church burns to the ground]].

** A zigzagged trope for the Primarchs. While they don't possess the battle experience their canon selves has, with the Emperor letting them have a childhood, correcting any genetic flaw within their make up as well as [[spoiler: Psychically binding each other and bringing them to the Astronomicon to deny any claims the Chaos Gods upon them]], they're much more mentally sound and balanced, with any issues between each other either nonexistent, easily dealt with or at least didn't hinder the Great Crusade as a whole. Each Primarch even possesses unique powers of their own which they had no problem utilizing. This is a far cry from the canon Primarchs, who grew up way too quickly and was forced to adapt to their environment to survive and while most of them came out unscathed, the mental state of some Primarchs were questionable at best. The Ascendant!Emperor lampshades this, calling the canon versions transhuman children in adult bodies.

* BatmanGambit: Eldrad tried to pull one on Magnus, using the Emperor's secretive nature against him in an attempt to have Magnus go along with his plans. [[spoiler: Except Magnus saw what he was planning and instead Eldrad got strung along instead]].

** While the Primarchs were a force to be reckoned with in canon, not even they were immune to the threat of Chaos, not helping that the Emperor didn't really have the proper parenting skills to manage them and mostly turned a blind eye to any flaws they possessed physically or mentally so long as they didn't hinder his Great Crusade. Here, with the scattering of the Primarchs prevented and [[spoiler: having his humanity regained and knowing the fates of his sons, he created many contingencies to prevent their fall, from psychically bonding them together and bringing them along the Astronomicon to eliminate any claim the Ruinous Powers have on the Primarchs as well as the Emperor telling his sons and humanity about the Immaterium and Chaos, they're more prepared for what threats they have to face and know that dealing with Chaos is bad news]].

* BreakTheHaughty: Ascendant!Magnus gets a brutal lesson in humility due to his over-reliance on Warp Powers, by being forced to fight a Sister of Silence, who is given full permission to kill the young Primarch if need be. It's deconstructed in that while it ''does'' work in breaking Ascendant!Magnus' pride, the methods used [[AdultFear disturbs the Emperor greatly as he could end up losing one of his beloved sons if things went wrong]]. The Emperor decides to prevent this from happening again by making it so that if someone wants to do something similar, they would have to receive explicit permission from himself or Malcador.

* NotSoDifferent: How Cegorach justifies himself after [[spoiler:he attempts to assassinate The Emperor on Proxima Centauri.]]

** The Legion of ''"The Silver Knights"'' (this timeline's version of the Grey Knights) are this UpToEleven, as they instead have gene-seed hybridisation of ''all Twenty Primarchs'', picking out the strongest anti-Chaos qualities of each and then further enhanced by the Emperor. The Legion is also lead by Eight "Super-Astartes", Perpetuals born from "The Angel"'s power, the prototype of a Primarch's Soul and an Avatar of Mankind, allowing them to regenerate from any wound and not be killed by most means. These Eight were created by the Emperor to fulfil their lack of a Primarch, using a improved hybrid creation method between the Custodes' and Astartes' creation processes along with the souls of fallen heroes. These Eight "Lord Paladins" are inferior to the Primarchs' might, but still possess immense psychic power and knowledge from hundreds of dead Astartes.

* FantasticRacism: Subverted; The Emperor gave his order to exterminate all alien life not because of this, but because Chaos activity during the Age of Strife made alien life potentially corrupted (he even list some species destroyed during this period). He also states that he can't always recognise Chaos taint on aliens or protect their souls. So he decide better be safe than sorry. Nevertheless, his sons disagree, and Magnus decides to try not to engage in pointless exterminations. The Emperor agrees, but warns them about potential consequences.

* FantasticRacism: Subverted; The Emperor gives his order to exterminate all alien life not because of this, but because Chaos activity during the Age of Strifeand inability made alien life potentially corrupted (he even list some species destroyed during this period). He also states that he can't always recognise Chaos taint on aliens or protect their souls. Nevertheless, his sons disagree, and Magnus decides to try not to engage in pointless exterminations. The Emperor agrees, but warns them about potential consequences.

* TheSwarm: It's 40k the Tyranids are coming. The [[spoiler: Rangda]] and other Great Crusade Xeno's count.

* WouldHurtAChild: When it becomes clear that the infant Primarchs cannot be retrieved thanks to the Legion of the Damned's intervention, Argal Tal orders his soldiers to kill Primarchs I, VI, VII, XI, XIII, XVIII, and XIX[[note]]Lion El'Jonson, Leman Russ, Rogal Dorn, the second missing Primarch, Roboute Guilliman, Vulkan, and Corvus Corvax[[/note]]. This was to ensure that the targeted Primarchs would never come to exist as they had in the canon timeline. Fortunately, the Legion of the Damned succeeds in preventing the Serrated Sun legion from doing so.

* EldritchAbomination: In droves. The Chaos Gods, C'tan, Rangda, Men of Iron, even the The Emperor to a degree.

* AbsoluteXenophobe: {{Averte|Trope}} by the Imperium this time around - while the Imperium has obvious reservations about working with aliens, it appears that the Emperor is willing to incorporate some species in as protectorates, albeit on a case-by-case scenario. One of the Xenos species considered for compliance is the Trileen (space trilobites).

* AdaptationalBadass: The Emperor was already a powerful force to be reckoned with in canon, but for all his intelligence and power, he could only do so much against the Ruinous Powers and was helpless to do anything as the empire he once forged become a perversion of everything he believed in. In this story, upon [[spoiler: receiving an immense power boost from his future self, increasing his already immense psychic powers, the Emperor was able to do a ''lot'' more damage to the Ruinous Powers. Upon lighting the Astronomicon, he was able to seal various warp rifts, has a farther reach and was able to ''push back the main gods of the Immaterium'', even going as far as to reduce their threat level by having the Angel go through a warp rift during the Lunar Rebellion, allowing him access into the darkest depths of the Warp where the Chaos Gods resided and ''caused significant damage to them by both exposing the weaknesses of their domains to each other and creating new ones in them, causing all four of them to break their already fragile alliance and focus on attacking each other due to their nature'']]. The Ascendant!Emperor already caused immense damage to the Ruinous Powers while the canon version can barely hold them back, with the canon Emperor slowly losing his influence, especially with the Great Rift's opening.

* AdaptationRelationshipOverhaul: The Emperor's relationship with the Primarchs. Since all 20 of them didn't get snatched up by the Ruinous Powers, it allowed him to develop something of a familial bond to all of them, with the Emperor even musing how much he missed his sons while he was away on Mars. A stark contrast to canon, to which he tended to pick a favorite, with Horus being deemed as the favored son and how Guilliman claims the Emperor viewed less of them as people and more as tools to be used.

* GodEmperor: What The Emperor of Mankind of the canon timeline ends up becoming inadvertently, something that his ascendant counterpart feared the most.

* NiceJobFixingItVillain: The Chaos Gods opened Great Rift... which allowed Throne-Emperor to send Legion of the Damned into past and prevent the plot to steal Primarchs.

* ScrewDestiny: How this story begins. The Legion of the Damned are sent back in time ten thousand years to prevent the scattering of the Primarchs.

* SparedByTheAdaptation: Uriah Olathaire, of ''The Last Church'' Fame, gets a far better fate here than in canon when the Ascendant!Emperor comes to visit him.

* TakeAThirdOption: The Emperor's approach to preventing the Primarchs from either falling to corruption or being soul-bound to him: [[spoiler: Bind their souls to each other in an unbreakable chain of brotherhood.]]
* TagTeamTwins: Alpharius and Omegon fight like this when it is necessary.

* WhamLine: When the Emperor reveals that [[spoiler: Cegorach is actually the last Old One.]]
** The Emperor may be a [[spoiler: part-Old One, the Craftsman, who helped ancient shamans to create the Emperor and merged his soul with him if Cegorach to be trusted. Also, there are more Old Ones.]]