Caprichrome

Devour is a red goblin mechanic, historically: a keyword built for creature-wide sacrifice, cashing in a swarm of small bodies to arrive as one enormous threat. Bending it onto white and narrowing the fuel to artifacts alone is the whole design idea here. Instead of eating your board, this eats your junk: the mana rocks that have done their work, the leftover tokens from a Thopter engine, a Treasure or two, an equipment you no longer need. Every artifact you feed it becomes a permanent +1/+1 counter, so the body scales with how much cheap artifact detritus your deck naturally accumulates. The flash-and-vigilance pairing is what makes the sacrifice math worth doing at instant speed: you can hold it up, let an attack resolve, and then flash in a devoured brute at end of turn or as a surprise blocker that still swings the following turn. That timing window turns a four-mana artifact sink into a live threat in a way sorcery-speed devour never could. On its own it is a 2/2 with flash and vigilance, which is nothing; the counter clause is the entire payoff, and it only pays if the deck upstream is manufacturing artifacts faster than it can profitably use them. It is a sink built to sit at the top of an artifact-token curve, converting spent resources into a clock.