Horizon of Progress

A land that produces any color your other lands can, ramps a land from hand onto the battlefield, and cashes itself in for a card when it has nothing left to do: the design here is the whole life of a mana source compressed into one permanent. It enters untapped and immediately fixes, so the early-game job is filtering rather than reaching for a fifth color. The middle ability answers a problem colorless utility lands rarely address, which is what to do when you have a surplus of lands in hand and no way to accelerate them; three generic mana buys a tapped drop, turning a dead card into board presence a turn early. Then the sacrifice clause resolves the tension every do-nothing land eventually faces: in the late game, when its mana no longer matters, it pays one generic, taps, and sacrifices itself for a card, ceasing to be a land and becoming a cantrip. The rate on each mode is deliberately modest (a life point for a color, plus a tap-and-sacrifice for a single draw), because the value is not any one ability but the way the three modes cover early, middle, and late without any of them going to waste. The color-filtering restriction is the honest one: it can only add a type of mana some land you already control could make, so it never conjures a color your deck cannot otherwise touch. It is a fixing land built to never be a topdeck you regret.