Golem Foundry

The conversion rate is the whole arithmetic problem here: three artifact spells cast, three charge counters accrued, one 3/3 Golem produced. That ratio asks the deck to pour resources through it before it pays out, and it only ever pays out once per three triggers. The reward is a payoff for going wide on cheap artifacts, the kind of build that floods the board with trinkets and wants a way to turn that volume into actual pressure. Stacking the counters takes time, and nothing about the engine accelerates: each Golem demands its own full set of three casts, so the foundry rewards sustained artifact volume rather than a single big swing. The activation has no mana cost beyond removing the counters, which means a stocked foundry can spit out a Golem on a turn you spent your mana elsewhere, but getting it stocked is the bottleneck that keeps the card from being a free win condition. It belongs to a familiar artifact-matters lineage where the deck is the engine and the card is the outlet, the place all those small spells finally cash in. Outside a deck genuinely committed to casting artifact after artifact, the foundry sits inert, a counter-bank waiting for fuel that never arrives.