GOHAN THE LEGACY

Isekai'd as future Gohan with one arm and a scar on his face. It looks like a hellish start, but Son Gohan, who crawled out of his grave, i had to defeat all the those future enemy while and reach the top of the universe.and cheat... System? What do I need a system for being Gohan is biggest Cheat i cloud ever get? [No system][Not brainless][Refreshing story]