Tamar, Lord of Dragonkind

+3: Put a 5/5 red dragon token with flying, first strike and haste into the battlefield under your control
0: Exile target permanent from the battlefield. Target dragon you control gains +X/+X where X is the exiled card's converted mana cost
-15: You get an emblem: for the rest of the game for each card that enters the battlefield you get a 7/8 red dragon token to with flying and trample