Diablo: I Created the Monster Series

[Ensemble cast + creating monsters + dark themes + monster sieges + no female lead + System + ruthless + a little conscience, but not much + heinous villain + major antagonist]

Xu Biao fell out with his college classmate over a woman, and the two eventually turned on each other like sworn brothers.

His enemy even used his family’s influence to drive Xu Biao’s family business into bankruptcy.

As a result, both of Xu Biao’s parents died, leaving him utterly penniless.

Just as he was driven to the brink of despair, he became bound to the Destruction System.

Using the System’s abilities, Xu Biao created one bizarre monster after another.

He made the monsters help him take revenge.