Breath of Malfegor

Five damage to the face for five mana, with the wrinkle that it hits every opponent at once rather than a single target. That asymmetry is the whole reason this exists: in a duel it is an overpriced, color-greedy burn spell, a worse Lava Axe wearing two pips it does not need; at a table of three or four, it is ten or fifteen damage stapled to one card, dealt at instant speed in response to a swing or on the crackback. The design is squarely a multiplayer artifact, built before "each opponent" templating became a routine lever for scaling a card's power to the size of the pod. It cannot touch creatures or planeswalkers, only players, which keeps it honest as a finisher rather than a sweeper: it closes a game it does not stabilize. The instant timing is the most interesting line on it, letting a near-dead player hold up the spell as a threat that punishes anyone who tries to push lethal through an empty board. As a piece of burn, the rate is plainly bad by single-target standards; as a many-bodied reach spell, the math inverts the moment a second opponent enters the equation. It is the kind of card that reads as a trap in a vacuum and as a clean kill the instant you count heads.