Winged Dragon of Ra

Flying, First Strike, Vigilance, Trample, Hexproof
As an additional cost to cast Winged Dragon of Ra, sacrifice three creatures.
Winged Dragon of Ra enters the battlefield with X +1/+1 counters, where X is the total power of the sacrificed creatures.
Pay all but 1 life: Put X +1/+1 counters on Winged Dragon of Ra, where X is the amount of life paid this way. Activate this ability only as a sorcery.
Pay 4 life: Destroy target creature.