A-Skemfar Elderhall

A green source with a Golgari sacrifice payoff stapled to the back end. Utility lands that tap for one color and then cash themselves in for a spell are a familiar Golgari trick, but the bundle here is aggressive: a targeted -2/-2 that clears a blocker or picks off a small threat, plus two Elf Warrior bodies, all from a single land slot. The "A-" rebalance tuned the activation cost, which tells you where the tension lived: the ability is a four-mana sorcery-speed sacrifice that demands double black, so it is deliberately gated to the point in a game where a spent land is a fair trade for board presence and reach. Note that the land itself only produces green; the double black comes from elsewhere, which means the payoff arrives late by design, once your base is deep enough to spare a color source. The entering-tapped clause is the tempo tax on the front half, paying for the fact that this dirt eventually swings a combat and rebuilds a board. What makes it more than a Forest with a rider is the timing lock: because the ability is sorcery-speed, you cannot hold it as a reactive answer, so the sacrifice is always a proactive commitment. The card asks you to know exactly when the green source stops mattering and the two-for-one starts, and to plan a turn ahead to have the mana ready when it does.