Vicious Offering

The kicker line is the whole pitch: pay only the two mana and you get a modest -2/-2, a spell that trades down against most bodies worth killing. Feed it a creature you no longer need and the same instant swings to -5/-5, enough to drag a fattie into range or finish a creature that pumped past the smaller mode. The price of the bigger effect is paid in board presence rather than mana, so the spell peaks exactly when you already have a creature whose job is finished: a chump blocker that has already blocked, a token, a creature about to die anyway. Instant timing matters more than the modest sticker rate suggests, since the kicked mode lets you ambush a combat trick or catch a creature at the end of its own pump window. A deck that manufactures disposable bodies turns the sacrifice from a tax into a feature. As toughness-reduction removal, it belongs to a long black tradition of buying reach the mana cost alone cannot afford by spending something other than mana; the wrinkle is that the resource here is a creature you control, so the removal spell doubles as a sacrifice outlet whenever the death of your own creature carries its own trigger.