Killmonger, Ruthless Usurper

A predator that turns your opponents' artifacts against them. Most anti-artifact designs in red are static hate: a one-shot Shatter, a lingering tax, a mass-destruction reset. This one weaponizes an opponent's board as an incentive structure, scaling its own aggression to their commitment. The attack trigger reads the defending player's artifacts and fires the moment the declaration happens, before blockers ever come down, so the more they've invested in mana rocks and equipment the larger the swing arrives. Connecting then strips one of those artifacts and hands you a Treasure, though the two clauses pull against each other: every artifact you force away is one less point of pump on the next attack. Trample matters far more here than its evergreen status suggests; without it a single chump blocker neuters the sacrifice-on-damage clause entirely, since that trigger keys off damage to a player specifically. And where punisher effects usually force the opponent into two bad outcomes, this one asks them nothing: it takes the artifact of their choice only after the damage has already gone through. Against an artifact-dense board it reads as a wrecking ball; against a stripped-down one the pump finds nothing to feed on, but the connection still nets you a Treasure, so even a hollow swing leaves you with ramp in hand.