Dusk Rose Reliquary

White has never lacked for cheap, permanent-based exile: Banishing Light, Oblivion Ring, and their many descendants tuck away a threat for a modest mana price and ask nothing else of you. This one demands a body. You cannot cast it without feeding an artifact or creature you already control into the effect, which keeps it out of the hands of any white deck that would otherwise jam it as a clean answer. That surcharge points the card squarely at aristocrats and sacrifice engines: it converts a spent permanent of your own into an opponent's spent threat, laundering fodder into disruption. The Ward does defensive work the older "exile until this leaves" permanents never had. Those answers were notoriously fragile, since destroying the ring handed the exiled threat right back, and a cheap Disenchant or Nature's Claim could unravel the whole investment for a pittance. Taxing the removal on your removal forces the opponent to pay real mana to reclaim what you took, closing exactly the vulnerability that has kept this family of exile-permanents honest for years. It is a small artifact doing three jobs at once: it turns your own dying permanents into interaction, it survives the pressure that used to break its predecessors, and it rewards a deck already built to throw its creatures away.