Sarkhan, The Awakened

+2: Draw a card, you may discard a card. If you do add 2 Mana in any combination spend this mana only to cast Dragon Spells
-4: Exile the top 2 cards of your library, you may play them this turn. Any Dragon cards exiled this way you may cast without paying their mana cost
-9: Draw 7 cards, you may put any number of dragon cards from your hand or in your graveyard onto the battlefield under your control