Starting As a Ghoul, I Fused with Riots and Slaughtered My Way Across the World

[Ghoul World is complete]

Monster 8 World is in progress.

[Eating + Killing + Torture + Extreme Enjoyment + The entire main cast is devoured + Invincible + Symbiote + Bickering + Multiverse + Evolutionary Flow + No Mary Sue + No Female Lead + Dark Theme]

A top assassin from his past life was brought to the ghoul world by a system. He was given a symbiote called "Riot" at the start. The two shared a body, and fighting and devouring were the only meanings of his existence.

Riot: "Left! Tear him apart! His kagune smells really good!"

Nothingness: "Shut up, you brainless lump of slime, I'm aiming for your vitals."

Riot: "Eat, eat, eat! Eating will make you stronger!"

Void: "If you make any more noise, you won't get to eat anything next time."

(Also, the author doesn't rely on this for a living; it's just something to write in their spare time. 50% of the book's profits will be donated to help others, 20% will be given to fans as gifts, and the remaining 30% will be used to buy themselves a pack of cigarettes. I'll post about the good deeds I do in the comments section, so please don't be so malicious towards the author, thank you.) Also, there's no need to send gifts; just give the author a few likes to urge them to update. I only want to urge them to update.