Darkmoss Bridge

The Bridges answered a problem the older artifact lands never balanced: an artifact-typed dual that fixes two colors is exactly the kind of card that hands an aggressive deck a free tempo swing, so how do you print one without warping the early game? The tapped clause is the whole tax. Every Bridge enters tapped, and that single line is the price aggro would never pay and grinding decks happily do. Indestructibility is the quieter half of the design, and most days it matters more than the color output: it walls off the land destruction and mass-artifact-removal that would otherwise punish a manabase leaning on artifact lands, so a Shatter effect or a Vindicate leaves it standing. The artifact type is what earns its keep beyond fixing, since it counts toward metalcraft, affinity, and every payoff that cares how many artifacts you control (it is not a Swamp Forest, and standard fetchlands cannot find it). Darkmoss Bridge sits in the black-green corner of the cycle, feeding the graveyard-and-sacrifice color pair that most wants an indestructible dual it can also count as an artifact for its engine pieces. The tapped land is a rate only fair, methodical decks are willing to swallow, which is the entire point: this is fixing built for the long game, not the fast one.