366Marvel: I'm a Symbiote » by Addyctive What happens when an average man dies by accident, only to be reborn into the Marvel Multiverse? What if he's reborn as a Symbiote? How does the new situation affect his psyche? Does he go crazy with the power that comes with being one of the strongest life forms in the universe? [OC is a Symbiote and bonds with multiple hosts.]

175 Layers of Hell: Scorched Earth » by TheDroppedFry A Doom: Eternal x Hazbin Hotel crossover /\ As the Testaments bespoke of a 'Doom Slayer', who hath ravaged the heavens with his presence, assisted by a demonic princess from the Land of Hell, he is befallen with absolute rage as he comes to find Earth has once more been seized by demonic forces. And so, in his journey of revenge, he aims to purge Earth again, once and for all...

1k+ Star-Bound » by The Incredible Muffin Some destinies are written out centuries, or even millennia, ahead of time. However, when destiny is derailed, new plans have to be implemented. Sometimes, that involves ripping someone away from the peaceful end they seek and thrusting them into a tide of never-ending war in order to fix what can never be repaired.

34Dark Symbiosis » by KingensCrew On another earth, Peter loses the last person he truly cared about. There was nothing but pain and misery in his life because of his role as Spider-Man. He had enough. Armed back with the symbiote, he will take whatever he wants and finally have the life he thinks he deserves. That starts with women. Peter/MassiveHarem. Smut. LawfulEvil!Spider-Man Crossposted on AO3

Incredibles: Secrets only lasts for so long » by BlindLight98 Like everybody in the world, Helen Parr has secrets, not even the closest to her knows. Dangerous and chaotic ones but secrets can only lasts for so long. This is the (fanmade) origin story of how Helen Parr who wasn't born with superhero powers but wished and got her wish come true at the expense of misuse. Incredibles/Symbiote fanfic. Mature themes included.

371 Doom Academia » by Deathmaywrite Three Hundred years. It'd been three hundred years since he was thrown into this hellscape. Three hundred years since he became one of the most fearsome beings in all of reality. Three hundred years since he began his genocide of demonkind. Now, though? Now he sat in his room, exactly how it had been the day he'd fallen through the hell portal. It was time for him to become a hero.

23symbiote sex story » by ReyesLen IF symbiote is converted into only gaining energy from sex, what will happen next? Mature content here!

225Spider-King: Conquest of Shadows » by Zayden StormVoid After the defeat of Knull, the Symbiotes are needing of a new King and what better than everyone's favorite Friendly Neighborhood Spider-Man. Watch as this hero deals with the death of his Aunt May, conquer worlds and women, how he will remake the world into better, brighter, and, ironically, darker one. Witness the rise of Spider-Man, King of the Shadows, God of the Symbiotes.

30She Venom: Jane's Tale Symbiote Continuation » by Janevenom Set in a alternative dimension several decades after Eddie Brock bonded with the Symbiote. Hopefully a long, slow, sexy story. I do have quite a long arc in mind. Just the begining. Be warned, there is scenes of extreme violence, non consensual sex and lots of Symbiote based action coming.

19 Warhammer 40K: Forward Unto Dawn » by JintaRequim Masterchief once thought the flood was horrifying, but he doesnt know how vast and scary the galaxy is...