Karai, Future of the Foot is a uncommon Legendary Creature — Human Ninja card from Teenage Mutant Ninja Turtles (TMT), collector number 151. Current market price: $0.24 (foil $0.24), TCGplayer market prices via Scryfall.
Sneak {2}{W}{B} (You may cast this spell for {2}{W}{B} if you also return an unblocked attacker you control to hand during the declare blockers step. She enters tapped and attacking.) Whenever Karai deals combat damage to a player, return target creature card from your graveyard to your hand. If her sneak cost was paid this turn, instead return that card to the battlefield.