Dragon Ball,Goku

Goku Black (ゴクウブラック Gokū Burakku), an entity that resembles Son Goku and refers to himself as such, before being given the name "Goku Black" by Bulma. He wears a single Potara earring and a Time Ring, the latter of which allows him to travel between different timelines at will, and also protects him from being erased by temporal paradoxes. He wreaks havoc in Future Trunks' timeline, bringing humanity to the brink of extinction. As he explains to Future Trunks, he has come to believe that utopia could only be achieved for the multiverse by bringing about the decimation of humanity and all other mortal beings, which he views as corrupt and violent