Sozin's Comet in hand or in exile (was foretold on a previous turn).
Notable Prerequisites
You control another creature that can attack this turn.
An opponent cannot block creatures you control.
Mana Needed
({3} magic symbol) ({R} magic symbol) ({R} magic symbol) at most available.
Steps
Cast
Sozin's Comet either from your hand by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) or from exile for its foretell cost by paying ({2} magic symbol) ({R} magic symbol) , causing each creature you control to gain firebending 5 until end of turn.
Declare
Hellkite Charger and at least one other creature as attackers, triggering each creature's firebending ability and
Hellkite Charger.
Resolve each firebending trigger, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) for each attacking creature.
Resolve the
Hellkite Charger trigger, causing you to pay ({5} magic symbol) ({R} magic symbol) ({R} magic symbol) to untap all attacking creatures and to get an additional combat phase after this one.