Jack, Enigmatic Muse

Lifelink, Deathtouch
Whenever Jack, Enigmatic Muse deals combat damage to a player, you may draw a card. If you do, that player loses 2 life.

1 {w}{b}, Sacrifice another creature: Jack gets +X/+X until end of turn, where X is the sacrificed creature's toughness.

"Your girlfriend made you a MtG deck. That's cool...
or weird...or both."