Ixthatyr, The Dreamwalker

+1: Draw two cards, then discard three cards.
-1: Discard two cards that share a type, then search your library for a card of the same type, reveal it, then put it on top of your library.
-4: Exile your hand and graveyard, then search your library for 13 cards and exile the rest. Shuffle your library, then draw 5 cards.