Dregscape Zombie

Two mana for a 2/1 that comes back once is a deliberately humble rate, and that humility is the entire pitch: unearth turns a creature's death from a loss into a deferred attack. The body trades cleanly in combat, hits the graveyard, then climbs back for a single black mana to swing one final time before exile claims it for good. That second life is one-shot by construction (exile at the next end step, exile if it would leave any other way), which is what keeps the recursion from snowballing into a value loop. The payoff is not the creature itself: it is what surrounds the creature. A sacrifice outlet converts the unearth into a free attacker fed to a cost; a graveyard-matters engine treats the trip to the yard as fuel rather than a setback; an aristocrats shell wants exactly this kind of disposable body that can be cashed in for a cost. Read alone it looks like filler. Read inside an engine that profits from creatures dying, it is a two-for-one stapled to a beater, payable in two installments. The sorcery-speed restriction is the leash that keeps it earthbound: unearth resolves only on your own main phase, and the haste it grants buys one attack step, not a surprise blocker or a combat trick. The creature comes back to swing and then leaves, which is precisely the window the rest of your deck has to monetize before the end step takes it away.