Erudition Starag

Magecraft — Whenever you cast an instant or sorcery, put an Oblivion counter on Erudition and draw a card. Then, if Erudition has 15 or more Oblivion counters, return all cards from your graveyard to your hand.
Erudition has +X/-X, where X is equal to the number of cards in your hand. If Erudition would die as a result of this ability, transform him instead.
Whenever an opponent discards a card, exile it. You may play that card until the end of your next turn, and you may spend mana as though i