Kanzenshuu

again with, this, he clearly said that he killed the kaio, because they were hindering his zero mortals plan

i think he just erase stuff without touching them, just by using his eye or somethign like that, notice how he always talk about erasing, when he is upset

he really does not fight at all, just powerful erasing hax

He's literally a walking contradiction. He says he hates mortals yet becomes the thing he hates by stealing Goku's body. He says he kills mortals as the duty of the gods, yet he kills those same gods. Terrible character. I have no idea why he decided on the future to execute his plan either, one ...

i come to the conclusion that black is zamasu, in the future, he become evil and in someway turned in goku maybe he steal his body

by following the occam razor, i want to keep it simple, and just choose the first assumption, which is that this goku is from the universe 6 earth that was created and he had not beaten his head and thus remained evil

it's easy really, it has do to with the fact thsat trunks changed his future, and when you change your time line by rmeoving some thign bad that you don't want, like cell, then something worse will happen