Possession Tale is a Au that takes place after the normal undertale geno route. The player gets bored and decides to use a third party site to hack the game in their favor but this goes terribly wrong and loads a parasite into the game that turns the kind monsters into ravenous creatures...that only goal is to destroy humans...it affected sans most of all making him so power hungry that he gained the ability to travel to different au's and kill them too...hes in the same god like category as Ink, Error and Dust dust sans. He does have lapses of sanity due to him trying to fight the parasite...The parasite mutates along with each soul he takes.
Thanks to the ppl above I made le theme by working meh magical editing powers UwU Listen kiddo...Your choices....they never mattered...
