As an additional cost to cast this card, sacrifice a nontoken black creature with power 6 or less.

Target opponent sends X cards from their hand and/or library to their graveyard, where X is equal to the sacrificed creature's power. If the sacrificed creature's power was 5 or more, any card sent to the graveyard this way cannot activate their abilities this turn. If the targeted opponent sent cards from their library to the graveyard this way, their library is then shuffled.