I am looking for a Korean/Chinese manhwa/Manhua where the protagnist lives long into ending for his world where monsters overrule the world and gains alot of wisdom about magic and whatnot and at his last moments he was transferred back to his younger self where he starts to use and abuse his wisdom and intelligence he collected in his previous life buffing his friends and himself.

I just cant find it...I dont know why.

It was a fun read, I wanted to read it again. Please tell me if you know it.

Never mind, I found it. It was tales of Demons and Gods