From the Start, I Drove the Heavenly Dao Mad, Though I Haven't Really Done Anything Wrong

[System, fast-paced, overpowered, high-energy throughout, satisfying, one heroine, no angst.]

A hundred years ago, Chen Mufan transmigrated to the Immortal Universe and awakened an against-the-heavens System. With its help, he reached the pinnacle of cultivation in the mortal realm in no time, becoming a half-immortal.

Chen Mufan should have ascended to the Immortal Realm, but the System told him that absorbing enough of the world's essence would let him cultivate a Chaos Devouring Body. Unable to resist the temptation, he spent the next two hundred years raising the Heavenly Dao in a thoroughly inhumane manner... until it went mad and collapsed.

Gentlemen, this book is way too satisfying. Enter at your own risk.