Killmonger, Scourge of Wakanda

The entry ability is a reflexive trigger, not an edict: sacrificing another creature isn't a cost you pay up front but an option that, once taken, licenses a second trigger to destroy any nonland permanent an opponent controls. What makes the design cohere is that both halves feed the same resource. The sacrifice pays for removal you'd otherwise spend a card on, and it fills the graveyard toward the two-creature count that flips the body from a 3/3 into a 5/4. That threshold is the quiet engine: the creature you sacrifice on entry is often the first deposit, so a single cast can remove a permanent and start arming the thing that just did it. It rewards the deckbuilding sacrifice strategies already lean on: expendable bodies, self-mill, recursion that keeps the yard stocked. The static buff is checked by graveyard hate in a way the removal isn't, which hands opponents a real lever: exile two creatures from under it and you're back to a 3/3 that has already spent its trigger. That split between a permanent threat and a fragile one keeps the card from collapsing into a pure value pile, and it plants the design squarely in the black-green sacrifice lineage that trades bodies for board presence and grinds the graveyard for advantage.