Seal from Existence

White's exile-until-leaves removal has always shared one structural weakness: it is removal that removal can undo. Oblivion Ring and Banishing Light hand back whatever they took the instant an opponent kills the enchantment, so each of them is a latent two-for-nothing waiting for a disenchant. The wrinkle here is a tollbooth on the escape hatch. To reclaim the exiled permanent, an opponent must first pay just to target the enchantment at all, then still spend the removal spell itself. That turns a clean answer to the answer into a real cost, and it changes how the exile behaves: the permanent stays gone unless someone is willing to overpay to fetch it back. The exile clause reaches any nonland permanent, so it can pull a commander, a planeswalker, an artifact engine, or a resolved threat off the board, and the ward sits on the leash keeping it there. What separates this from its predecessors is not the mana value (all three land at three) but the color demand: the double-white commitment prices it into decks already leaning hard on the color, in exchange for making the answer meaningfully harder to answer. It is the same removal shell those older enchantments established, hardened at the one seam that always leaked.