Yuriko, the Tiger's Shadow is a rare Legendary Creature — Human Ninja card from The List (PLST), collector number C18-52. Current market price: $3.62, TCGplayer market prices via Scryfall.
Commander ninjutsu {U}{B} ({U}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand or the command zone tapped and attacking.) Whenever a Ninja you control deals combat damage to a player, reveal the top card of your library and put that card into your hand. Each opponent loses life equal to that card's mana value.