Molten Rebuke
The modal Equipment clause is the interesting part here, because it is doing something removal almost never gets to do: bundle a normally niche answer onto a broadly useful card. Five mana for five damage to a creature or planeswalker is unspectacular on rate, the kind of number that only ever looked reasonable in a set built around dense, resilient bodies. But "choose one or both" changes the cost-benefit math. You are not paying a premium to hedge; you get the Equipment destruction attached to a real removal spell for free, meaning a dead card against decks without artifacts still fires the primary mode. That is the design lever red rarely pulls: artifact hate that does not clog your hand when the opponent brought none. The historical shape it borrows from is the split-purpose burn spell, but split cards force a choice, whereas the "one or both" template lets a single point of removal answer two threats when the board obliges. The catch is that both modes are modest: five damage is a lot of mana for a single creature, and Equipment destruction is contingent on the opponent playing Equipment worth destroying. It rewards a metagame where creatures are big and swords are sharp, and reads as filler in one where neither is true.
