Chittering Witch is a rare Creature — Human Warlock card from Tarkir: Dragonstorm Commander (TDC), collector number 175. Current market price: $0.29, TCGplayer market prices via Scryfall.
When this creature enters, create a number of 1/1 black Rat creature tokens equal to the number of opponents you have. {1}{B}, Sacrifice a creature: Target creature gets -2/-2 until end of turn.