C'njixthiael, the Inexorable

Flying, Vigilance, Annihilator 3
As an additional cost to cast this spell, sacrifice
three nontoken permanents.
C'njixthiael can block an additional three
creatures each combat.
{w}{u}{b}{r}{g}, {t}: Until end of turn, you may cast
a card from your hand without paying its mana
cost.