Ironsoul Enforcer

The gating condition is what turns a generic artifact-recursion body into a design worth studying: the trigger only fires when this creature or a commander you control attacks alone. That "alone" clause refuses the go-wide plan and rewards the go-tall one, asking you to send a single threat into the red zone and get an artifact back from the graveyard as payment for the risk. Attaching the ability to "a commander you control" rather than only to itself is the tell that this was built for a format where a legendary body is the reliable, recurring attacker: the Enforcer can sit back, keep its own 4/4 in reserve, and let the commander swing solo to trigger the return. The reanimation targets any artifact card, so the toolbox scales with the deck around it: a mana rock, an equipment, a game-ending artifact bomb, all fair game to loop back turn after turn as long as you honor the single-attacker discipline. The tension between aggression and reward is the reason it repays study. Most reanimation asks you to pay mana or life; this one asks you to accept a combat constraint, to leave your board home and expose one creature, and pays out only when you commit to that restriction. It is combat-math recursion, an artifact engine that lives entirely inside the decision of how many creatures to send.