Okiba-Gang Shinobi is a common Creature — Rat Ninja card from Betrayers of Kamigawa (BOK), collector number 76. Current market price: $1.83 (foil $21.32), TCGplayer market prices via Scryfall.
Ninjutsu {3}{B} ({3}{B}, 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, that player discards two cards.