Holgaith, Night Watcher

-2: Destroy target creature, place a 2/2 Legendary Raven creature token with flying onto the battlefield under your control.
-1: Until end of turn if a Legendary Raven Token deals damage to a player, place that many loyalty counters on Holgaith.
-X: Target player looses X life and you gain X life. If a player lost 10 or more life this way, you win the game.