Defiant Salvager

The sacrifice outlet that asks for nothing in return except the chance to grow. Most sac engines spend the fodder for an external payoff: a drain trigger, a draw, a token. This one folds the payoff back into its own body, banking each sacrificed permanent as a permanent +1/+1 counter, which makes it a self-contained graveyard-and-aristocrats piece in a single slot rather than half of a two-card engine. The sorcery-speed restriction is what keeps that free outlet from becoming an instant-speed combat trick or a way to flicker death triggers in response to removal; you cannot pump it as a surprise blocker or sacrifice in reply to an exile effect, so the counters only accrue on your own turn, on your own terms. That timing clause does real work: a free repeatable sac outlet at instant speed would be a far more dangerous tool for protecting permanents from removal and dodging exile. Capped this way, it reads instead as a grindy value creature that turns a board of spent artifacts and chump blockers into a clock. The Aetherborn artificer flavor lands on the right mechanic too: a creature literally cannibalizing the machinery around it to reconstitute itself, larger each time.