Emrakul, Reservoir of Thought

Flying, indestructible
When Emrakul enters the battlefield, if you have no cards in your hand, draw 7 cards. Otherwise, draw 3 cards.
{2}{c}{c}, {t}: Exile target land, target creature, target planeswalker, target artifact, target enchantment, the top card of target player's library, and a card from target player's hand.