Doppelgangers + all kinds of cheat abilities + near-invincible
Ling Tian carelessly fell into a sewer and drowned while walking. After transmigrating into the world of One Piece, he gained a System and made his way through the Myriad Worlds.
Many years later, he became an invincible being, a figure forbidden by the heavens.
Starting with One Piece, the main worlds include Naruto.
