Chittering Witch (BLC) from Bloomburrow Commander, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Winona Nelson
• Card Text:
  When Chittering Witch enters, create a number of 1/1 black Rat creature tokens equal to the number of opponents you have.
  1B, Sacrifice a creature: Target creature gets -2/-2 until end of turn.