Cast Sozin's Comet either from your hand by paying {3}{R}{R} or from exile for its foretell cost by paying {2}{R}, 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}{R}{R}{R}{R} for each attacking creature.
Resolve the Hellkite Charger trigger, causing you to pay {5}{R}{R} to untap all attacking creatures and to get an additional combat phase after this one.
Repeat from step 2 each combat phase.

Infinite combat phases

Infinite red mana

Infinite combat damage

Hellkite Charger

Sozin's Comet

Cast Sozin's Comet either from your hand by paying {3}{R}{R} or from exile for its foretell cost by paying {2}{R}.
Declare a creature as an attacker, triggering its firebending ability, adding {R}{R}{R}{R}{R}.
Move to your postcombat main phase. You will not lose the mana due to Electro.
Activate Aggravated Assault by paying {3}{R}{R}, causing you to untap all creatures you control and to get an additional combat and main phase after this one.
Repeat from step 2.

Infinite damage to one opponent

Infinite untap of creatures you control

Infinite mana creatures you control can produce

Aggravated Assault

Electro, Assaulting Battery

Cast Sozin's Comet from your hand by paying {3}{R}{R} or from exile for its foretell cost by paying {2}{R}, giving each creature you control firebending 5 until end of turn.
Declare The Incredible Hulk as an attacker. Its firebending ability triggers, adding {R}{R}{R}{R}{R}.
Holding priority, activate Pyrohemia by paying {R}, dealing 1 damage to each creature and player.
The Incredible Hulk triggers, putting a +1/+1 counter on it, untapping it and giving you an additional combat phase after this one.
Repeat from step 2 each combat phase.

Near-infinite combat phases

Near-infinite damage to all players

Near-infinite +1/+1 counters on a creature

Bruce Banner // The Incredible Hulk

Pyrohemia

Cast Sozin's Comet by paying {3}{R}{R}.
Declare Charnelhoard Wurm as an attacker, triggering its firebending ability, adding {R}{R}{R}{R}{R}.
Holding priority, cast Savage Beating by paying {3}{R}{R}, causing you to untap all creatures you control and get an additional combat phase after this one.
Deal combat damage using Charnelhoard Wurm, triggering its ability, returning Savage Beating from your graveyard to your hand.
Repeat from step 2.

Infinite storm count

Infinite magecraft triggers

Charnelhoard Wurm

Savage Beating

Cast Sozin's Comet by paying {3}{R}{R}.
Declare Charnelhoard Wurm as an attacker, triggering its firebending ability, adding {R}{R}{R}{R}{R}.
Holding priority, cast Great Train Heist by paying {2}{R}{R}, selecting its first mode, causing you to untap all creatures you control and get an additional combat phase after this one.
Deal combat damage using Charnelhoard Wurm, triggering its ability, returning Great Train Heist from your graveyard to your hand.
Repeat from step 2.

Infinite tapped Treasure tokens

Infinitely powerful creatures you control until end of turn

Great Train Heist

Combos with "Sozin's Comet"