Kozilek, Unrelenting Slaughter

As you cast Kozilek, Unrelenting Slaughter, exile three creatures.
When Kozilek, Unrelenting Slaughter attacks, defending player loses life equal to the total number of exiled cards. You may draw up to that many cards.
And so he rose, from the very core of Zendikar. The Gatewatch can't protect this world forever.