Bolas's Horns

{t}: You may exile 2 cards from a graveyard
and put a card from exile into your graveyard.
If you do, you may search your library and/or
exile for a card named Nicol Bolas,
Exiled-God, reveal it, and put it into your
hand. If you search your library this way,
shuffle it. Bolas cards gain hexproof this turn.
{t}: Put cards with {u}, {b}, and {r} in exile onto the battlefield tapped.