System + Apocalypse + Ruthless Protagonist + Unhinged Lead
I transmigrated into the body of a madman and accidentally stamped out the chosen savior.
The System forces me to impersonate him, but I'll wear the killer's name and carve my way through the whole world!
Can devouring souls make me stronger? Then I'll start by devouring a legendary powerhouse for fun!
The apocalypse arrives, and the gods reveal themselves.
Holding the savior's head, I grin at the gods:
"Are you next?"
This blurb doesn't do the story justice. Please, Your Majesties, move on to the main text.
[Insanely satisfying dark fantasy + no do-gooder protagonist + unhinged from the start]