Ugin's Labyrinth

Colorless ramp has always been the hard case: you can print a rock that adds one, but doubling it usually means paying full price up front, the way Grim Monolith or Basalt Monolith ask. This solves the problem sideways by taxing your hand instead of your mana. Feed it a heavy colorless payload as it enters (an Eldrazi titan, a big artifact you were going to hardcast eventually) and the land immediately produces two, turning a card you can't afford yet into a temporary discount on everything else. The exile is not lost value; the third ability hands the imprinted card back whenever you're ready to spend it, so the "cost" of the ramp is only ever a timing delay. But the imprint window is narrow: it triggers only on entry, so once you reclaim your titan the land quietly reverts to producing one, permanently. There is no reloading it. That single-shot design carries the whole tension: the doubled output is a battery that charges once, off your most expensive card, and discharges the moment you cash that card in. It lines up neatly with any deck that wants seven-plus-drops early and doesn't mind holding them a turn or two longer, but it asks you to reclaim that card deliberately, because doing so switches the land back to producing one for good.