Ultraman: I Am the Dark Planet Gransphia

[A mindless story. Don’t read if that’s not your thing. Thanks.] After transmigrating, receiving a System gift pack, and being abandoned, the protagonist discovers that he has become a black-hole sphere of Sphia, also known as the dark planet Gransphia. He splits himself into multiple Sphia spheres, Sphia vanguard units, and sends them to various universes to mark locations and gather energy. Calling himself a cosmic wanderer, he travels from one universe to another.