Lady Olenna, Queen of Thorns

Gift a treasure (You may promise an opponent a gift
as you cast this spell. If you do they create a treasure token before its other effects)
When Lady Olenna enters the battlefield, If the gift was promised, destroy target creature.

{g}{g}, {t}: Draw a card.

"Why, she's just the littlest bit of a thing. There was nothing the least bit thorny about her."