Okuu the Unstable Sun

Flying
When Okuu the Unstable Sun enters the battlefield, for each {r} used to cast it, it deals
1 damage to all other creatures and each player
When Okuu the Unstable Sun enters the battlefield, if {w}{w}{w}{w} was used to cast it,
destroy all other creatures
The ultimate energy is nuclear fusion power!
Won't you fuse with me?