Urza, Chief Artificer

Affinity has almost always lived in the artifacts themselves: cheaper equipment, cheaper spells, a discount you spend on tempo. Here it prices a legend, and the discount points inward at the board you are already building. Each artifact creature already in play shaves a mana off the cast, so a wide artifact deck can deploy this 4/5 legend for a fraction of its printed cost, then keep deploying because the end-step token is a Construct that scales with your total artifact count rather than arriving as a fixed body. The menace grant is the piece that turns all of this from a value engine into a clock: a board where every artifact creature demands a double-block overwhelms the ground defense that go-wide decks usually stall against. The three-color identity is doing real work too, folding white's token production and black's recursion into a shell that historically wanted to stay colorless. What it asks in return is commitment: the discount, the token size, and the evasion all key off the same resource, so it rewards flooding the battlefield with artifacts and punishes a slow, careful build. This is a mono-artifact payoff wearing three colors of support, and the design leans hard on one idea: a swarm of individually small artifact creatures, each unblockable-by-one and each feeding the next Construct, is a more dangerous board than any single large threat.