Hardlight Containment

White's exile removal usually pays for permanence with a body-return clause or a chunk of mana: Path to Exile hands over a land, Journey to Nowhere gives the creature back if the enchantment dies. This one keeps the return clause (the exile lasts only until the Aura leaves) but reroutes where the fragility lives. Instead of enchanting the creature it removes, it latches onto an artifact you already control, then reaches out to banish an opponent's creature for a single white mana. The opponent has two roads back to their creature: destroy the Aura directly, or destroy the artifact carrying it, since killing the enchanted permanent drags the Aura off with it. The ward it grants only guards one of those roads. It sits on the artifact, not on the Aura itself, so a Disenchant aimed at the enchantment answers the exile without paying a tax; the ward taxes only attempts to break it by removing the host artifact. The real constraint is the artifact requirement: with no artifact on the battlefield to enchant, the card cannot resolve as removal at all, so it earns its slot only in a deck already committed to an artifact base. That folds the removal into your own board development rather than offering a clean one-mana answer. It reads less like an exile spell than a reason to keep an artifact on the table: the removal and the build-around incentive are the same card.