Utsuho Reiuji

Flying, haste
Spend only {r} or {w} on X.
Nuclear Fusion—When Utsuho Reiuji enters the battlefield, it deals X damage to any target. If
X is between 4 and 6, it deals X damage to up to
X targets. If X is greater than 6, it deals X
damage to each opponent and each creature and planeswalker you don't control and the damage
can't be prevented.