Obsessive Pursuit (TLA)

Enchantment

When this enchantment enters and at the beginning of your upkeep, you lose 1 life and create a Clue token. (It's an artifact with "{2}, Sacrifice this token: Draw a card.") Whenever you attack, put X +1/+1 counters on target attacking creature, where X is the number of permanents you've sacrificed this turn. If X is three or more, that creature gains lifelink until end of turn.

Niche sacrifice payoff for aggressive black strategies, but the life loss and reliance on multiple sacrifices per turn limit its consistency compared to more efficient threats and card advantage engines in the same mana range.

Avatar: The Last Airbender — Rare