Powerstone Minefield

Punishing combat from a fixed point on the battlefield, this taxes every attack and block on the table for as long as it stays in play. The damage lands automatically, the moment a creature is declared, which makes it brutal against the small bodies that aggressive decks lean on: a 2/1 attacker dies to the trigger before it ever connects, and a 1/1 blocker is wiped off the board the instant it stands in front of anything. The design discipline is the flat 2: too small to threaten the four-toughness creatures that midrange and control rely on, large enough to gut the swarm strategies it was built to police. It punishes both sides of combat equally, so the controller cannot simply chump-block under its own enchantment; the price of slowing the board with bodies is the same for whoever does it. That symmetry is the whole point. The damage falls on everyone who declares a creature, which makes this a defensive piece rather than an aggressive one: it rewards the deck that wants combat not to happen, the deck that would rather win without committing creatures at all. Its real lineage is the small family of static "you may not attack profitably" enchantments, the ones that quietly rewrite the math of an alpha strike before anyone has declared a swing.