Mistblade Shinobi is a common Creature — Human Ninja card from Betrayers of Kamigawa (BOK), collector number 43. Current market price: $1.89 (foil $43.69), TCGplayer market prices via Scryfall.
Ninjutsu {U} ({U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever this creature deals combat damage to a player, you may return target creature that player controls to its owner's hand.