Unforge

Equipment destruction is a thin category to begin with, and most of what red has offered against it is generic artifact removal that treats a Sword the same as a Mindslaver. The wrinkle here is the rider: blow up the Equipment, and the creature that was wearing it eats two damage. That turns a piece of pure disruption into a two-for-one against the exact decks Equipment was built for. A creature relying on its blade to survive combat math loses the blade and frequently the body in the same instant, and against the small aggressive creatures that tend to carry cheap gear, two damage is often lethal on its own. The instant speed is doing real work too: the answer waits until the Equipment has actually been moved onto a target, so you are not guessing whether to spend the card on the artifact while it sits idle. It punishes the commitment, not the existence. The constraint that pays for the upside is the rider's conditionality: an unattached Equipment is just destroyed, no damage, no surplus, so the whole payoff is gated behind the opponent choosing to attach. As a narrow hoser it asks you to read the board correctly, but when the read lands it answers two threats with one card in a color that rarely gets to do that against artifacts.