Soldevi Machinist

The mana it taps for is real, but it can only walk in one direction: it pays for artifact abilities and nothing else, never a spell, never a creature, never the back half of your turn. Ice Age was assembling an artifact-activation subtheme, and the recurring problem with such themes is how to power expensive tap-to-do-something machines without flooding the rest of your curve with free colorless. This is the purpose-built answer: two colorless from a 1/1 body that would be overpriced if the mana were spendable anywhere, walled off so it never helps cast a counterspell or accelerate a fatty. It runs on the same accountant's logic that filtering and ritual designs would later refine, where the mana exists but only flows toward a single sanctioned use. The payoff depends entirely on owning artifacts whose activated abilities are worth that much repeatable colorless, and until those pieces are on the board a 1/1 that produces nothing useful is a slow promise to keep. As a build-around it is narrow by intent: dead weight in a deck without the machines to feed, and quietly humming in one assembled around them.