I’m looking for a book outside of the Douluo Dalu novels that has a similar power up system. To gain ability or power absorb -blank- (doubt it’s soul rings) and stronger -blank- absorbed is stronger ability or power. I don’t know if there is other novels like it but who knows, maybe I’m lucky. I’ve only read the first and second(up to translation) novels of the DD series so I don’t know if it changes power system later on given Spoiler that there’s talk of potential soul beast extinction in the second one. Therefore I’m referring to the system in the first and second novels.
Cunning ML- though slightly black bellied starts as nothing live in a mine town. A mysterious teacher gives him the opportunity to expand and grow at a prominent academy where he (the teacher) has hidden his legacy. Difficulties fitting in, very food-driven and an uncanny ability to rally people to his side, and more. I don't really like going into to much more. Suffice to say, give this one a try. I think it's a fantastic follow-up to the Douluo Dalu Series.