Shield Wall

A pure toughness pump at instant speed, designed for one job: surviving the combat math an opponent has already committed to. The +0/+2 shape is the defensive mirror of Giant Growth, and the design discipline is what makes it interesting rather than just narrow. By granting no power, the card refuses to double as a finisher; it is locked into the role of combat trick that saves the board, not one that breaks through. That restriction was how early white kept its instant-speed combat tools honest: green got the lethal pump, white got the wall. The all-creatures clause completes the structure, turning what would otherwise be a one-creature rescue into a board-wide blowout against a wide attack, which is exactly the math white was being built to win. Later instants iterated on the same idea with upside attached (Brave the Sands grants vigilance, Rootborn Defenses leaves tokens behind, Make a Stand grants indestructible), and each of those printings makes clearer what this card was: the unadorned baseline of the white defensive trick, before the color learned to ask for more.