Zamasu is conceptually the strongest most difficult to beat Dragon Ball villain. He is one of the hardest characters to beat in fiction.
Is his emergence a lose condition for every 'verse that doesn't have a Zeno button equivalent?
>hop to another universe
He can follow you.
>time travel and kill Zamasu before he becomes immortal
Tanks that.
>stay in the past where he is killed
He knows how many timelines are there and can go to any of them.
>trap and betray him
One of his components can cut holes in reality and teleport.
>use enough force to "kill" him
HAHAHAHAHAHA
Zamasu can copy the Kaioken like Goku Black did with instant transmission upon seeing it once. Zamasu could most likely receive Zenkais. Zamasu is in a perpetual state of Super Saiyan Rose and feels zero strain. Zamasu could most likely achieve the higher Super Saiyan forms for more power if he needs it.