the gift horse

When The Gift Horse enters the battlefield, target opponent gains control of it. At the beginning of your upkeep, choose one — Accept the Gift: You draw a card and gain 3 life. Look It in the Mouth: Target opponent looks at the top three cards of your library, puts one into your graveyard, and puts the rest back in any order. If they do, they gain control of The Gift Horse. “Don’t check its teeth. Just pull the cart.”