Sozin's Comet in hand or in exile (was foretold on a previous turn).
Aggravated Assault and
Ashling on the battlefield.
Notable Prerequisites
You control a creature that can attack this turn and that cannot be blocked or killed by an opponent.
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) .
Declare a creature as an attacker, triggering its firebending ability, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Move to your postcombat main phase. You will not lose the mana due to
Ashling.
Activate
Aggravated Assault by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) , causing you to untap all creatures you control and to get an additional combat and main phase after this one.
Repeat from step 2.
Notes
You can attack with multiple creatures to get infinite red mana.