Ninja

You may activate this card's augment ability any time you could cast an instant. Whenever this creature deals combat damage to a player, Augment {2}{B} ({2}{B}, Reveal this card from your hand: Combine it with target host. Augment only as—oh, never mind.)

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6oqqtcjrhdpb1hy4unv13w.