Tawnos, Urza's Apprentice

Most copy effects target spells or permanents; this one reaches into a stranger layer of the game. The activated and triggered abilities produced by artifacts are their own objects on the stack, and doubling those objects is a rarer trick than doubling the cards that spawn them. Every tap of an artifact mana rock's non-mana ability, every enters-the-battlefield trigger off an artifact creature, every Sol Ring imitator's utility line becomes a resource that can be run twice in a turn. The restriction that pays for that reach is precision: the ability has to come from an artifact source and it has to be yours, so this is not a generalist copy engine but a payoff wedded to a board already committed to artifacts. Haste is the tell that the design wants this online the turn it lands, closing the gap between deploying an artifact engine and exploiting it. The blue-red framing fits the historical figure it names, an artificer working in Urza's shadow, and the ability reads as a mechanical echo of that role: not building the machines but multiplying what they output. The 1/3 body is built to survive rather than attack, which matters when the whole plan is to keep tapping the same activated ability across successive turns. It is a narrow key that only turns in an artifact-dense deck, and there it turns hard.