Hissing Miasma

The punishment is aimed entirely outward: nothing happens when you attack, only when you are attacked, which makes this a defensive deterrent rather than a damage engine. It taxes aggression one life at a time, asking the opponent whether each swing is worth the bleed. Against a single attacker per turn the drain is almost rhetorical; against a wide creature deck that needs to commit bodies to the red zone, the arithmetic compounds fast, and an alpha strike of six or seven attackers becomes a meaningful self-inflicted wound on top of whatever blocks you make. The pull runs in two directions at once: it is strongest against the decks that least want to slow down, and nearly inert against the controlling decks that would happily ignore it. The structural cousin here is the family of effects that punish a chosen action regardless of board state; this one narrows the trigger to attacks against its controller specifically, so it works as a personal toll booth rather than a global tax. It does no blocking, kills nothing, and stops no single hit on its own. That narrow window has always cast it as a hate piece for a particular kind of grindy, multi-attacker table rather than a workhorse: the enchantment you reach for when the problem is repeated attacks rather than any one creature you could simply remove.