Training Compound

Most fixing lands reward a manabase that has already sanded away its basics: fetch chains, shocks, and utility lands stacked so deep that a Mountain or a Forest looks like a liability. This one inverts that logic. Its colored output is tethered to the presence of a basic land, so the greedy nonbasic pile that most dual-land templates court finds it stranded, producing nothing but colorless once its arrival window closes. A deck that keeps genuine Mountains and Forests in the mix gets red or green on demand. The design pays for untapped, on-color Gruul mana not with a life cost or a mandatory tapped turn but with that basic-land condition, plus an alternate unlock on the turn it enters: the entered-this-turn clause lets it produce color even in a build that runs no basics at all, but only for as long as that turn lasts. What that leaves is a fixing land for the aggressive two-color deck that never wanted many nonbasics to begin with, and a dead colorless source for the greedy build it superficially resembles once the summoning turn passes. It punishes the manabase that thinks it is too sophisticated for basics, and rewards the one honest enough to run them.