Nicol Bolas, Unifyng King

+2: Draw a card. If it's land, put it onto the battlefield, create a reinforcement token, and repeat this process until you draw a non-land card.
-3: Amas 3 (Create a 3/3 red, black, and blue dragon army creature token or put three +1/+1 tokens on an army you control).
-12: Exile any number of cards from your library and create that many 2/2 colorless dragon army tokens that gain a +1/+1 counter whenever they attack.