Resurrected Cultist

A 4/1 for three mana is a body priced to die: enough power to trade up or push through in a race, so little toughness that removal, a stray ping, or an unfavorable block ends it. That fragility is the setup, not the flaw. Once delirium is online, the creature that couldn't survive a combat step reassembles itself from the graveyard for four mana at sorcery speed, and the low toughness that got it killed is exactly what got it into the yard where the recursion can find it. The two clauses close a loop: black already wants four card types among its cards for other payoffs, so hitting the threshold is often free, and this pays it off with an attacker that returns on your terms. The finality counter caps the whole thing. The returned copy exiles when it dies instead of going back to the graveyard, so each body earns precisely one resurrection, and that ceiling is what lets black have a recurring threat at this rate without grinding an opponent into inevitability. The design treats death as fuel: build a graveyard varied enough (a land, an instant, a sorcery, an artifact, whatever fills out the count) and the return is live when you want it, priced high enough that bringing it back costs you a real turn's worth of mana instead of coming for free. Aristocrats-adjacent fodder that happens to buy itself back once, then commits.