Three Blind Mice - Promo Pack (PWOE) from Wilds of Eldraine, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Andrew Mar
• Card Text:
  (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.