Cast Brightstone Ritual by paying its mana cost
Holding priority, cast Reiterate with buyback by paying {4}{R}{R}, creating a copy of Brightstone Ritual and returning Reiterate to your hand.
Resolve the copy of Brightstone Ritual, adding at least six {R}.
Repeat from step 2.

Infinite magecraft triggers

Infinite red mana

Infinite storm count

Reiterate

Brightstone Ritual

Cast Brightstone Ritual by paying its mana cost.
Holding priority, activate Pili-Pala by paying {R} and tapping it, copying Brightstone Ritual.
Resolve the copy of Brightstone Ritual, adding at least {R}{R}
Activate Pili-Pala by paying {2} and untapping it, adding one mana of any color.
Repeat from step 2.

Infinite colored mana

Pili-Pala

Dual Casting

Cast Brightstone Ritual from your graveyard for its escape cost by paying {R} and exiling three other cards from your graveyard, adding at least {R}{R}{R}{R}.
Activate Ambassador Laquatus by paying {3}, causing you to mill three cards.
Repeat.

Infinite self-mill

Underworld Breach

Ambassador Laquatus

Activate Elite Arcanist's ability by paying {1} and tapping it, casting a copy of Brightstone Ritual without paying its mana cost.
Resolve Brightstone Ritual, adding at least {2}.
Activate Pemmin's Aura's first ability by paying {1}, untapping Elite Arcanist.
Repeat.
If you control three or more Goblins, this combo nets infinite mana.

Elite Arcanist

Mycosynth Lattice

Pemmin's Aura

Activate Elite Arcanist's ability by paying {1} and tapping it, casting a copy of Brightstone Ritual without paying its mana cost.
Resolve Brightstone Ritual, adding at least {2}.
Activate Freed from the Real's second ability by paying {1}, untapping Elite Arcanist.
Repeat.
If you control three of more Goblins, this combo nets infinite mana.

Combos with "Brightstone Ritual"