Myrsmith

White's token-generators usually fire once, stapled to a single creature's enters-the-battlefield trigger; this is a standing engine instead, converting artifact volume into a board for an extra each time you cast an artifact spell. That toll keeps it from snowballing for free: you need both the mana and the artifact density to feed it, not a single lucky cast. A 2/1 contributes nothing on its own, and the trigger lives or dies by what surrounds it, so on an empty board it is a two-drop the rest of your deck has to justify. But the design is honest about its job. As a Myr generator specifically, it gives white a seat at the heart of the artifact-and-affinity lineage the color rarely gets to anchor: most of that work is colorless or splashed into the artifact decks' off-colors, while this card exists to turn the artifact subtheme into attackers rather than card advantage. The further you lean into cheap artifacts, the more each cast pays out a second time. It is the unusual creature where a list that reads redundant on paper is exactly the list that wants it.