Cast Grinning Ignus by paying {1}{R}.
Birgi and Hazoret's Monument trigger.
Resolve Birgi's trigger, adding {R}.
Resolve Hazoret's Monument, allowing you to discard a card and draw a card.
Activate Grinning Ignus's ability by paying {R} and returning it from the battlefield to your hand, adding {C}{C}{R}.
Repeat.

Infinite colorless mana

Infinite creature ETB

Infinite creature LTB

Infinite rummaging

Infinite storm count

Birgi, God of Storytelling // Harnfel, Horn of Bounty

Grinning Ignus

Hazoret's Monument

Activate Skirk Prospector by sacrificing Squee, adding {R}.
Cast Squee from your graveyard by paying {R}{R}.
Runaway Steam-Kin and Hazoret's Monument trigger.
Resolve the Runaway Steam-Kin trigger, putting a +1/+1 counter on it.
Resolve the Hazoret's Monument trigger, allowing you to loot.
Repeat two additional times.
Activate Runaway Steam-Kin by removing three +1/+1 counters from it, adding {R}{R}{R}.
Repeat.

Infinite death triggers

Infinite draw triggers

Infinite looting

Infinite creature sacrifice triggers

Squee, the Immortal

Runaway Steam-Kin

Skirk Prospector

Cast Squee, the Immortal by paying {R}{R}.
Birgi and Hazoret's Monument trigger.
Resolve Birgi's trigger, adding {R}.
Resolve Hazoret's Monument's trigger, allowing you to discard a card to draw a card.
Activate Skirk Prospector by sacrificing Squee, adding {R}.
Repeat.

Cast Squee, the Immortal by paying {R}{R}.
Birgi and Hazoret's Monument trigger.
Resolve Birgi's trigger, adding {R}.
Resolve Hazoret's Monument's trigger, allowing you to discard a card to draw a card.
Activate Phyrexian Altar by sacrificing Squee, adding {R}.
Repeat.

Phyrexian Altar

Activate Phyrexian Altar by sacrificing Squee, adding {R}.
Cast Squee from your graveyard by paying {R}{R}.
Runaway Steam-Kin and Hazoret's Monument trigger.
Resolve the Runaway Steam-Kin trigger, putting a +1/+1 counter on it.
Resolve the Hazoret's Monument trigger, allowing you to loot.
Repeat two additional times.
Activate Runaway Steam-Kin by removing three +1/+1 counters from it, adding {R}{R}{R}.
Repeat.

Cast Squee, the Immortal by paying {R}{R}.
Birgi and Hazoret's Monument trigger.
Resolve Birgi's trigger, adding {R}.
Resolve Hazoret's Monument's trigger, allowing you to discard a card to draw a card.
Activate Thermopod's second ability by sacrificing Squee, adding {R}.
Repeat.

Thermopod

Activate Phyrexian Altar by sacrificing Squee, adding {R}.
Cast Squee from your graveyard by paying {R}{R}.
Quintorius and Hazoret's Monument trigger.
Resolve the Quintorius trigger, creating a 3/2 Spirit creature token.
Resolve the Hazoret's Monument trigger, allowing you to rummage.
Activate Phyrexian Altar by sacrificing the Spirit, adding {R}.
Repeat.

Infinite self-discard triggers

Quintorius, Field Historian

Activate Thermopod's second ability by sacrificing Squee, adding {R}.
Cast Squee from your graveyard by paying {R}{R}.
Quintorius and Hazoret's Monument trigger.
Resolve the Quintorius trigger, creating a 3/2 Spirit creature token.
Resolve the Hazoret's Monument trigger, allowing you to rummage.
Activate Thermopod's second ability by sacrificing the Spirit, adding {R}.
Repeat.

Activate Catalyst Elemental by sacrificing it, adding {R}{R}.
When Catalyst Elemental dies, Enduring Renewal triggers, returning Catalyst Elemental from your graveyard to your hand.
Cast Catalyst Elemental by paying {1}{R}.
Hazoret's Monument triggers, allowing you to rummage.
Repeat.

Combos with "Hazoret's Monument"