Activate Grinding Station by tapping it and sacrificing another artifact, causing you to mill three cards.
Cast Rite of Flame from your graveyard for its escape cost by paying {R} and exiling three other cards from your graveyard.
Saheeli triggers, creating a 1/1 Servo artifact creature token.
The Servo enters the battlefield, triggering Grinding Station, untapping Grinding Station.
Resolve Rite of Flame, adding {R}{R}.
Repeat.

Infinite self-mill

Near-infinite death triggers

Near-infinite creature ETB

Near-infinite creature LTB

Near-infinite magecraft triggers

Near-infinite red mana

Near-infinite creature sacrifice triggers

Near-infinite storm count

Saheeli, Sublime Artificer

Underworld Breach

Grinding Station

Rite of Flame

Cast Rite of Flame by paying {R}.
Displacer Kitten triggers, blinking Invasion of Arcavios.
When Invasion of Arcavios enters the battlefield, it triggers, searching your library or graveyard for another instant or sorcery with mana cost equal to {R} and putting it into your hand.
Resolve Rite of Flame, adding {R}{R}.
Cast the other instant or sorcery by paying {R}.
Displacer Kitten triggers, blinking Invasion of Arcavios.
When Invasion of Arcavios enters the battlefield, it triggers, returning Rite of Flame from your graveyard to your hand.
Resolve the other instant or sorcery spell.
Repeat.

Infinite casts of a specific spell

Infinite magecraft triggers

Infinite storm count

Instant or Sorcery with Mana Cost = {R}

Displacer Kitten

Invasion of Arcavios // Invocation of the Founders

Cast Pyretic Ritual by paying {1}{R}.
Displacer Kitten triggers, blinking Invasion of Arcavios.
When Invasion of Arcavios enters the battlefield, it triggers, searching your library and/or graveyard for Rite of Flame and putting it into your hand.
Resolve Pyretic Ritual, adding {R}{R}{R}.
Cast Rite of Flame by paying {R}.
Displacer Kitten triggers, blinking Invasion of Arcavios.
When Invasion of Arcavios enters the battlefield, it triggers, returning Pyretic Ritual from your graveyard to your hand.
Resolve Rite of Flame, adding {R}{R}.
Repeat.

Infinite red mana

Pyretic Ritual

Cast Desperate Ritual by paying {1}{R}.
Displacer Kitten triggers, blinking Invasion of Arcavios.
When Invasion of Arcavios enters the battlefield, it triggers, searching your library and/or graveyard for Rite of Flame and putting it into your hand.
Resolve Desperate Ritual, adding {R}{R}{R}.
Cast Rite of Flame by paying {R}.
Displacer Kitten triggers, blinking Invasion of Arcavios.
When Invasion of Arcavios enters the battlefield, it triggers, returning Desperate Ritual from your graveyard to your hand.
Resolve Rite of Flame, adding {R}{R}.
Repeat.

Desperate Ritual

Cast Seething Song by paying {2}{R}.
Displacer Kitten triggers, blinking Invasion of Arcavios.
When Invasion of Arcavios enters the battlefield, it triggers, searching your library and/or graveyard for Rite of Flame and putting it into your hand.
Resolve Seething Song, adding {R}{R}{R}{R}{R}.
Cast Rite of Flame by paying {R}.
Displacer Kitten triggers, blinking Invasion of Arcavios.
When Invasion of Arcavios enters the battlefield, it triggers, returning Seething Song from your graveyard to your hand.
Resolve Rite of Flame, adding {R}{R}.
Repeat.

Seething Song

Combos with "Rite of Flame"