Hysterical Blindness

A Fog that wears removal's clothing. The -4/-0 sweep strips power without touching toughness, so nothing dies and the opposing board walks away from the turn unscathed; what it buys is a single combat step where the attackers connect for almost nothing. A swarm of small bodies gets reduced to negligible damage, a lone fatty shrinks to a number you can survive, and your own blockers stay live instead of trading away. The instant timing is the entire pitch, slotting into the declare-attackers step the way a defensive trick should, dodging the sorcery-speed window a true sweeper would occupy. But the design quietly punishes the wrong read: it does nothing against an empty board, and nothing about trample math beyond the raw reduction. This is the source of the gap between how it reads and how it plays. The -4 looks like a kill number, and the absence of a toughness clause is precisely what stops it from being one. It is a reactive effect that borrows a sweeper's silhouette, closer in function to Fog than to anything that affects the game past this turn: next turn the opposing creatures are all back to full size, ready to swing again into a player who has spent a card to buy one more breath.