Amari's Dragonslayer

+2: Amari's Dragonslayer deals 4 damage to target Dragon / Dragon-born. You gain that much life.
-5: Exile target dragonborn even if they're a planeswalker. Deal damage to target player where the damage is the loyalty or toughness of exiled card
-12: Exile all Dragons and dragon related cards. Amari's Dragonslayer clones himself and turns the clone into an 18/10 with protection from Dragons