Saitama, just a hero for fun

Flash, haste, flying, indestructibe, deathtouch,
trample, vigilance.
Saitama's power and toughness is equal to the
total of your opponent life +1.
Whenever you win the game, if you control
Saitama, just a hero for fun, you win the game
twice.
{r/w}Saitama can't be blocked.
{r/w}: Exile Saitama, then return that card to the
battlefield under its owner's control.