Sarkhan, the Dragonlord

+2: Add one mana of any color to your mana pool. Add three mana of any color to your mana pool if you control five or more Dragons.
-3: Deal three damage to target creature or player. Then target Dragon you control gets +2/+0 until end of turn.
-15: You get the emblem, "Whenever you cast a spell, search your library for a dragon card and put it into your hand. Then shuffle your library.