Transmigration: I Became a Holy Spirit and I'm Here for Fun!

Luo Yu transmigrated and gained the power of the Holy Spirit. But with the Demon Spirit around, he became the savior of the world.

Before all that, though, let me have some fun.

It all begins in the world of Yu-Gi-Oh!.

[The protagonist is invincible, there are multiple heroines, and he has a bit of a wicked streak and loves stirring up trouble.]