Activate Pyrohemia by paying {R}, dealing 1 damage to each creature and player.
Raphael triggers, adding {R}.
Repeat.

Near-infinite damage to all players

Raphael, Ninja Destroyer

Pyrohemia

Deal damage to Raphael.
Raphael and Blazing Sunsteel trigger.
Resolve the Raphael trigger, adding that much {R}.
Resolve the Blazing Sunsteel trigger, dealing that much damage to Raphael.
Repeat from step 2.

Infinite damage

Infinite red mana

Blazing Sunsteel

Declare any creature as an attacker, triggering Dawnsire, dealing 100 damage to Raphael.
Raphael triggers, adding 100 {R}.

Near-infinite red mana

Dawnsire, Sunstar Dreadnought

Cast Chain Lightning by paying {R}, dealing 3 damage to Raphael and then causing you to pay {R}{R} to copy Chain Lightning, with the copy targeting Raphael.
Raphael triggers, adding {R}{R}{R}.
Resolve the Chain Lightning copy, dealing 3 damage to Raphael and then causing you to pay {R}{R} to copy Chain Lightning, with the copy targeting Raphael.
Repeat from step 2.

Chain Lightning

Declare Smaug as an attacker, triggering its ability, dealing at least 5 damage to Raphael.
Raphael triggers, adding at least {R}{R}{R}{R}{R}.
Move to your postcombat main phase.
Activate Aggravated Assault by paying {3}{R}{R}, causing you to untap all creatures you control and get an additional combat and main phase after this one.
Repeat

Infinite combat phases

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Smaug the Magnificent

Aggravated Assault

Declare Smaug and Hellkite Charger as attackers, triggering their abilities.
Resolve the Smaug trigger, dealing at least 7 damage to Raphael.
Raphael triggers, adding at least seven {R}.
Resolve the Hellkite Charger trigger, causing you to pay {5}{R}{R} to untap all attacking creatures you control and get an additional combat phase after this one.
Repeat each combat phase.

Hellkite Charger

Activate Blasting Station by tapping it and sacrificing Thorin.
When Thorin dies, Nim Deathmantle triggers, causing you to pay {4} to return Thorin from your graveyard to the battlefield and attach Nim Deathmantle to it.
When Thorin enters, it and Blasting Station trigger.
Resolve the Blasting Station trigger, untapping it.
Resolve the Thorin trigger, attaching Nim Deathmantle to Raphael, and then having Raphael deal 6 damage to itself.
Raphael triggers, adding six {R}.
Resolve the Blasting Station ability from step 1.
Repeat.

Combos with "Raphael, Ninja Destroyer"