Three Blind Mice is a rare Enchantment — Saga card from Wilds of Eldraine Promos (PWOE), collector number 35s. Current market price: — (foil $2.86), TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.) I — Create a 1/1 white Mouse creature token. II, III — Create a token that's a copy of target token you control. IV — Creatures you control get +1/+1 and gain vigilance until end of turn.