Broodheart Engine

Reanimation usually rides on a creature body or a one-shot spell; here it comes bolted to a two-mana artifact that does something useful every turn until you cash it in. The upkeep surveil is the connective tissue: it seeds the graveyard the sacrifice ability later spends, so the two halves are a single loop wearing two hats. You bin the cards you don't want, tuck away the ones you do, and shape a target across the same turns the artifact quietly sits on the board. Then, at sorcery speed, it eats itself to return a creature or Vehicle. That Vehicle clause is the tell: this was built for a world of crewable threats, widening the net past the usual "return target creature" template. And because the artifact is its own cost, there is no card disadvantage on the graveyard side the way a heavy reanimation spell demands. What two mana buys is patience with a payoff attached. It doesn't need the biggest thing in your yard the way a burst reanimator does; it accrues surveil value while it waits, then cashes out for whatever the game has handed you. The friction is all in the activation: four extra mana, a tap, and the sacrifice, usable only as a sorcery. Because the target is chosen on activation rather than on cast, nothing is telegraphed by playing it early. It is a resource that ripens, then spends itself in one deliberate window an opponent can plan around.