Gaorah, the Berserker

As an additional cost, you may discard X cards. If you do, Gaorah, the Berserker, deals three times X to any target. Draw X cards, then discard two.
Double Strike, haste, trample
If Gaorah, the Berserker would be put into the graveyard or exile from anywhere, shuffle Gaorah, the Berserker and your graveyard and cards in exile into their owner's library.