I Forge a Golden Core with a Mortal Body. What Can You Compare?

[Fantasy, lighthearted comedy, and a scheming protagonist] You bully me for being nothing but a mortal. Just wait until I embrace the demonic path: I’ll wipe out every last one of you. Driven from home by his stepfather at the age of ten, the boy accidentally enters an entirely new world. After he joins a sect, it is destroyed. He joins another sect, and that one is destroyed too. Every sect that grows close to him meets a grim fate...