Ruins of Trokair

White's slice of the Fallen Empires sacrifice-land cycle, sitting alongside Ebon Stronghold, Dwarven Ruins, Havenwood Battleground, and Svyelunite Temple. The design idea is a ramp impulse translated into white's color pie: a permanent mana source that converts into a temporary burst. It taps for one white like any other source, but its second mode trades the land itself for a one-shot detonation of double white. The cost is built into the rate twice over. It comes in tapped, so the burst is never available the turn you play it, and spending the land permanently shrinks your manabase, which is why the payoff has to be front-loaded into a single explosive turn rather than spread across a game. That makes it a card about timing a spike: you hold the sacrifice for the turn a double-white acceleration actually wins you tempo, then you live without the land afterward. It is a structural ancestor of later "sacrifice for value" lands, the core idea being that a land can be both a steady drip and a one-time detonation, with the delayed entry the friction that prevents the burst from coming for free.