Excava, the Risen Past
Reanimation is a black idea, and the one job Boros keeps failing to do on its own is bring something back and use it this turn. Here the recursion is welded to the declaration of an attack: the trigger fires the moment this is declared as an attacker, before combat damage, and whatever climbs out of the graveyard arrives already on the battlefield rather than in hand, so it can block later or feed a sacrifice engine the same turn. The recursion ceiling stays low and cheap, capped so the payload is a small permanent rather than a haymaker, and the finality counter is the tax that stops the loop from running forever: each returned card is a one-shot, exiled on its next trip to the graveyard, so the ability rewards a deck stocked with disposable bodies over a single fatty worth chaining. Stapling a 1/1 flying Spirit body onto the returned card is the quiet part doing real work: it hands every reanimated artifact or non-Aura enchantment an evasive attacker and a creature line those permanents did not otherwise have, which lets aristocrat and death-trigger payoffs treat them as sacrifice fodder. Flying and haste on the front end serve the engine directly: because the value fires on the attack step, an evasive attacker that comes down swinging starts grinding the turn it lands. What results is a Boros aristocrats-and-recursion piece built to churn incremental bodies out of the yard, not to cheat one enormous creature into play.
