Cast Phlage by paying {1}{R}{W}.
When Phlage enters the battlefield, its first and second abilities trigger.
Holding priority, activate Saffi by sacrificing it, targeting Phlage.
When Saffi dies, Havi triggers, returning any legendary creature card with mana value 1 or less from your graveyard to the battlefield.
Resolve the Saffi ability.
Resolve the second Phlage trigger, dealing 3 damage to any target and causing you to gain 3 life.
Resolve the first Phlage trigger, causing you to sacrifice it.
When Phlage dies, Havi and Saffi trigger.
Resolve the Havi trigger, returning Saffi from your graveyard to the battlefield.
Resolve the Saffi trigger, returning Phlage from your graveyard to the battlefield.
Repeat from step 2.

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite damage

Infinite lifegain triggers

Infinite lifegain

Havi, the All-Father

Saffi Eriksdotter

Phlage, Titan of Fire's Fury

Cast Phlage either from your hand or from the command zone by paying {1}{R}{W} plus commander tax, if applicable.
When Phlage enters the battlefield, its first and second abilities trigger.
Resolve the second trigger, dealing 3 damage to any target and causing you to gain 3 life.
Resolve the first trigger, causing you to sacrifice Phlage.
When Phlage dies, Luminous Broodmoth triggers, returning Phlage from your graveyard to the battlefield without a flying counter on it due to Solemnity.
Repeat from step 2.

Luminous Broodmoth

Solemnity

Cast the artifact in your hand by paying {0}.
Teshar triggers, returning Phlage from your graveyard to the battlefield.
When Phlage enters the battlefield, its first and second abilities and Loran trigger.
Resolve the first Phlage trigger, sacrificing it.
Resolve the second Phlage trigger, dealing 3 damage to any target and causing you to gain 3 life.
Resolve the Loran trigger, returning the other {0} cost artifact from your graveyard to your hand.
Resolve the spell cast in step 1.
Activate the {0} cost artifact by sacrificing it.
Repeat.

Combos with "Phlage, Titan of Fire's Fury"