Winged Dragon of Ra

Flying, haste, indestructible, shroud, trample
Split Second, Tribute 10

Ra enters the battlefield with X +1/+1 counters equal
to your life total.
Pay X life; Exile target permanent with converted
mana cost X. Or put X +1/+1 counters on Ra.

If Ra wasn't cast, sacrifice it on your next
end step.