Urza's Power Plant

One of three differently-named lands Antiquities scattered across the set, almost certainly as flavor pieces rather than a deliberate ramp engine. Read in isolation, it taps for a single colorless and nothing more. Read alongside Urza's Mine and Urza's Tower, the trio assembles into seven mana from three lands, because each piece reads the board for the other two and upgrades its own output: the Power Plant goes from one colorless to two the moment the Mine and Tower are present. That conditional self-bonus is the whole engine. Each land is one-third of the math, and removing any single piece collapses every land back to baseline, which is what makes fetching the missing third with Sylvan Scrying or Expedition Map function as four mana of acceleration rather than a one-for-one tutor. The design accident became a load-bearing pillar of colorless ramp for decades, the foundation under "ramp into giant colorless threats" as an archetype. What sets the Power Plant apart within the cycle is its anonymity: the Mine carries the iconic art, the Tower carries the payoff line, and the Power Plant is the quiet middle term, no less essential to the count but the least remembered. The hyphenation on its type line (Urza's Power-Plant) is a vestige of Antiquities' inconsistent typesetting that the rules text has had to accommodate ever since.