Purphoros's Intervention

An X-spell that refuses to commit until you know which resource the game is short on. The damage mode is the reactive half: doubling X into damage against a creature or planeswalker means two damage per mana beyond the red pip, a rate steep enough to kill most creatures and dent a planeswalker for a fraction of what a raw X-burn spell would cost. But it can only point at creatures and planeswalkers, so it is removal, full stop. The token half is the proactive one, an Elemental with trample and haste that swings the turn it lands and then sacrifices itself at end of turn. That self-sacrifice is the price of the aggression: you buy a single connection of X trample damage, not a permanent, so the mode can never grind a board or leave a blocker behind. The interesting tension is that both halves scale off the same investment while pulling in opposite directions, one answering a threat and one presenting one, and you commit at cast rather than at deckbuilding. Red has long collapsed removal and reach into single cards, since burn kills a creature or the opponent with the same spell, but this splits that dual identity back apart and hands the choice to your open mana: kill the thing you cannot beat, or throw a disposable X-power body at the face when the coast is clear.