Bloodchief Ascension 23 (Avatar: The Last Airbender: Eternal-Legal)

At the beginning of each end step, if an opponent lost 2 or more life this turn, you may put a quest counter on this enchantment. (Damage causes loss of life.) Whenever a card is put into an opponent's graveyard from anywhere, if this enchantment has three or more quest counters on it, you may have that player lose 2 life. If you do, you gain 2 life.

NM - $21.63
LP - $17.30
MP - $12.36
HP - $8.24
DMG - $4.12