Incendiary Flow

Three damage for two mana sits in the broad family of cheap red burn that has always been priced relative to Lightning Bolt, but the exile rider is what gives the card a distinct job. Most burn answers a creature by killing it and dropping it in the graveyard, where recursion does its work. This one watches the whole turn: any creature that takes its three damage and dies before end of turn gets exiled instead, whether it dies to the burn itself or to combat or a second spell stacked on top of it. That window is the real design. Against persist, against undying, against the recursion threats that treat a normal kill as a temporary inconvenience, the difference between an answer and a delay is exactly this clause. It also rewards softening a tougher creature with the three damage first, then finishing it off with a blocker or a follow-up removal spell, so the kill lands in the exile bin rather than the bin you can mine. The cost stays honest because the exile only ever applies to creatures, and only to ones that actually die this turn: there is no open-ended value layered on, no upside against a creature you cannot finish off, nothing extra when it points at a face. It trades the pure flexibility of damage for certainty against the things that refuse to stay dead, while keeping the reach to close out a player when that is what the turn calls for.