The Winged Dragon of Ra

Flying, Vigilance
The Winged Dragon of Ra can't be countered
As an additional cost to cast this creature sacrifice
three creatures you control
Pay {x} life: Winged Dragon of Ra gets
+{x}/+{x} until end of turn. You cannot gain life
until end of turn.
Pay 3 life: Exile target creature. Return it to the
battlefield at the beginning of the next end step.