Progenitus, Sire of Power

Flying, Haste, Vigilance, First Strike, Double Strike
{x}: Choose up to 4 target creatures. each of those creatures gains -X/-X, where X is the amount of mana you spend on this.
{x}: You gain 5 life, and this card gains +X/+X, where X is the amount of planeswalkers you have in your graveyard and hand.