Reborn Against the Heavens: The Strongest Good-for-Nothing

After falling in battle against the Demon Realm, the strongest cultivator, Emperor Shenyuan, unexpectedly reincarnates as a useless cultivator with an awful constitution, weak mental strength, and no cheat, only the experience from his previous life.

This is the story of a good-for-nothing who uses his past-life experience to return to the peak and claim supremacy over the Three Realms.