Guadosalam, Farplane Gateway

Enters tapped, taps for one of two colors, and asks for nothing in return: this is the plainest form of dual land there is, the tapland design that has anchored two-color mana bases in every era where untapped duals were priced out of reach. The tempo cost is the whole transaction. You surrender a turn of speed the moment it comes down, and in exchange you get color access with no life payment, no basic-land-type dependency, no revealed-hand condition, no shockland penalty. That trade is why this kind of land is the default fixing for decks that can afford to enter a game a beat slow: midrange and control shells care far less about a single tapped land than aggressive ones do, which is exactly the population this design was built to serve. The Town subtype is flavor scaffolding rather than a functional hook here, since no rules text keys off it. What defines the card is its absence of friction: it produces green or blue on demand every turn it stays on the battlefield, and the only price it ever charges is collected once, on arrival.