Toofer, Keeper of the Full Grip (MB2-318) - Mystery Booster 2

Whenever a spell you control causes you to gain card advantage, each opponent loses 2 life. (You gain card advantage each time a spell you control resolves and you end up having more cards relative to your opponents than before that spell resolved. Divination, Annihilate, and Wrath of God can all be card advantage. And remember: tokens aren't cards!)