Deadly Alliance

Unconditional removal that kills a creature or a planeswalker sits at four or five mana in black, with the higher end usually accepting the cost as the tax for hitting both target types. Here the sticker price is five, but the number printed on the card is a ceiling, not a floor: fill out all four class slots and the spell collapses to a single black mana, matching premium one-mana removal while still reaching a planeswalker, which most of that premium tier cannot touch. The catch is that a full complement of classes is a real deckbuilding demand rather than a freebie. Run it in a deck indifferent to creature types and you are paying retail for a five-mana kill; assemble the classes and you are casting a Hero's Downfall for one. Because it resolves at instant speed, the discount is measured the moment you cast it, so a board assembled during your opponent's turn pays out exactly as well as one assembled on your own. That instant timing quietly punishes trading: the same bodies that drop the cost are the ones you least want to chump-block with or feed to a sacrifice outlet, so the price is paid in maintained board presence rather than mana. This is the clearest statement of the deal the four-class party mechanic offers: build around a fixed spread of classes without leaning on tribal lords, and the discount comes out of what you keep on the table.