Glimmervoid

The deal is a perfect five-color land that taps for any color of mana with no enters-tapped clause, no life loss, no gate to open. The price is conditional and ongoing: it survives only while you control an artifact, a condition checked every end step. That single restriction is what tethered the card to its home plane, a world where artifacts were the dominant card type and the upkeep was nearly free. There the land became the connective tissue of multicolor artifact decks: one untapped source that produced whatever the spell on top of your hand demanded. Outside that context, the design forces a different kind of deckbuilding discipline, since an empty board at the wrong moment turns your fixing into a sacrifice. The cleverness is that the artifact requirement is rarely a tax in the decks that actually want this; if you are casting five colors of spells off an artifact-heavy base, you almost always have a Signet, a Treasure, or a leftover Equipment hanging around to satisfy it. The end-step timing matters too: the check happens after combat and after most artifacts would resolve, so a board you wipe clean during your own turn can quietly cost you the land before you ever notice. It is fixing with a heartbeat, alive only as long as the deck around it is doing what it was built to do.