Backdraft Hellkite

Flashback usually hands you a spell back on your terms: instant speed, whenever the mana is free, no strings attached. Here it is stapled to an attack trigger, which reframes the whole thing. The spells in your yard come back only if you send a 4/4 flyer into the red zone first, and the window closes at end of turn, so a stocked graveyard becomes a resource you can spend across the rest of the turn rather than only mid-combat. That matters: because the grant lasts until end of turn, you can swing, resolve the trigger, then unload the recovered instants and sorceries in your second main phase where the sorceries are actually castable. The flashback cost equals the original mana cost, so nothing is discounted; this is a burst engine, not a grind engine, a way to convert a single attack into a storm-adjacent main phase if the yard holds cheap, high-impact spells. The one thing it does not do is loop: flashback exiles each card on resolution, so a spell cast off one attack is gone, not waiting for the next swing. Extra combat steps help only insofar as they let you cast more of what remains before the turn ends. The ceiling is entirely a function of how much you were willing to discard, mill, or spend earlier. Reanimator lists get a Dragon worth cheating out ahead of curve; spellslinger builds get a one-shot rebuy of everything they have already burned through, redeemable exactly once.