Midnight Scavengers

Meld is the rarest of Magic's two-card payoff mechanics, and its whole design problem is redundancy: you assemble a transformation from two separately castable cards, and the trap is that neither half earns a slot unless the combination happens. This is the piece of its pair built to sidestep that trap. In isolation you get a five-mana 3/3 whose enter trigger buys back a small creature from your graveyard, a value body that recurs the mana dorks, one-drops, and sacrifice fodder a black deck wants to keep replaying. The cap on what it can return keeps the floor honest: it fetches modest creatures back to your hand rather than the battlefield, so this refills rather than finishes, and you still have to recast whatever you recover. The combination lives across the pair. Graf Rats carries the meld trigger during combat; control both and they transform into Chittering Host. That makes this the half designed to justify its own inclusion whether or not the meld ever assembles: cast it for the enter-the-battlefield value, hold the upside in reserve. The design lesson is in the asymmetry. One piece does the heavy lifting on the transformation, the other stands on its own as a value engine, and the meld payoff rides on top of a card you would run regardless.