Retrofitter Foundry

A production line disguised as a one-mana artifact. The escalation is the whole architecture: Servos are cheap chaff, but the machine only rewards you for feeding them upward, converting a 1/1 into a flying Thopter and a Thopter into a 4/4 Construct. Each tier taxes the last, so the Foundry punishes hoarding and pays out streaming, and the untap ability turns the tap-limited engine into something that runs multiple times per turn once you have the mana to spare. What makes the design elegant is that it doesn't just make tokens, it consumes them: the sacrifice clauses mean each Servo and Thopter you generate has somewhere to go, which is exactly the kind of throughput that fabricate, servo-generators, and artifact-sacrifice payoffs were built to exploit. On its own it grinds slowly, one Construct every couple of turns. Paired with a way to blink or copy the untap, or a proliferation of Servos from elsewhere, it becomes a factory floor that turns disposable bodies into a stream of 4/4s. The card sits at the intersection of two artifact-deck impulses, the wide swarm and the go-big finisher, and offers to bridge them with a single cheap permanent that never dies to creature removal.