Artificer's Hex

Aura removal that goes after the wrong target on purpose. Where black's enchantment-based answers usually land on the creature itself (a Pacifism effect, a Dead Weight, a -X/-X aura), this one fixes itself to the Equipment and waits. Attach it to a Sword, a Batterskull, a Loxodon Warhammer, and the next time that gear is carried by a creature at your upkeep, the bearer dies. The design exploits a structural quirk of Equipment: gear persists through its wielder's death and gets re-equipped, so a single removal spell pointed at the creature is a poor trade against a deck that keeps suiting up. Pinning the Aura to the Equipment turns one card into a recurring tax on every creature that ever picks the thing up, and it survives the removal-and-recast cycle that Equipment decks rely on. The cost is patience and a real targeting restriction: it does nothing until the Equipment is attached to something, the kill waits for your upkeep rather than firing at instant speed, and an opponent who reads the threat can blunt it by equipping a token or an expendable body before your turn, paying the equip cost to feed the Hex something they can afford to lose. It also requires that the opponent be running Equipment at all, which is the narrowness that prices a one-mana enchantment that can, in the right matchup, read as repeatable removal.