Requiting Hex

As an additional cost to cast this spell, you may blight 1. (You may put a -1/-1 counter on a creature you control.) Destroy target creature with mana value 2 or less. If this spell's additional cost was paid, you gain 2 life.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6opndaiva7pb1hbtx0tlbs.