Vicious Offering is a common Instant card from Dominaria (DOM), collector number 110. Current market price: $0.06 (foil $0.10), TCGplayer market prices via Scryfall.
Kicker—Sacrifice a creature. (You may sacrifice a creature in addition to any other costs as you cast this spell.) Target creature gets -2/-2 until end of turn. If this spell was kicked, that creature gets -5/-5 until end of turn instead.