Activate Rith's Attendant by paying {1} and sacrificing it, adding {R}{G}{W}.
When Rith's Attendant dies, Luminous Broodmoth triggers, returning Rith's Attendant from your graveyard to the battlefield without a flying counter on it due to Solemnity.
Repeat.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite red mana

Infinite green mana

Infinite white mana

Solemnity

Luminous Broodmoth

Rith's Attendant

Activate Kiki-Jiki by tapping it, creating a token copy of Rith's Attendant with haste.
Activate the Rith's Attendant token by paying {1} and sacrificing it, adding {R}{G}{W}.
When the Rith's Attendant token dies, Kiki-Jiki triggers, untapping itself.
Repeat.

Kiki-Jiki, Mirror Breaker

Thornbite Staff

Activate Orthion's second ability by paying {6}{R}{R}{R} and tapping it, creating five token copies of Rith's Attendant with haste.
Activate a Rith's Attendant token by paying {1} and sacrificing it, adding {R}{G}{W}.
When the Rith's Attendant token dies, Orthion triggers, untapping itself.
Repeat from step 2 for each remaining Rith's Attendant token.
Repeat from step 1.
Once you have infinite mana, you may forego sacrificing the Rith's Attendant tokens and/or target any other creature.

Infinite copies of creatures you control with haste

Infinite creature tokens with haste

Orthion, Hero of Lavabrink

Activate Rith's Attendant by paying {1} and sacrificing it, adding {R}{G}{W}.
Activate Arcbound Reclaimer by removing a +1/+1 counter from it, putting Rith's Attendant from your graveyard onto the top of your library.
Activate Oracle's Vault's second ability by tapping it, exiling Rith's Attendant from the top of your library with the ability to play it until end of turn without playing its mana cost.
Cast Rith's Attendant from exile without paying its mana cost.
Rocco's second ability triggers, putting a +1/+1 counter on Arcbound Reclaimer and creating a Food token.
Activate Clock of Omens by tapping the Food and Rith's Attendant, untapping Oracle's Vault.
Repeat.

Infinite storm count

Infinite tapped Food tokens

Rocco, Street Chef

Oracle's Vault

Arcbound Reclaimer

Clock of Omens

Cast Hollow One either from your hand or from your graveyard by paying at most {1}, causing it to enter the battlefield as a copy of Rith's Attendant due to Infinite Reflection.
Activate Hollow One by paying {1} and sacrificing it, adding {R}{G}{W}.
If you cast Hollow One from your graveyard, Hollow One is not exiled by Abandoned Sarcophagus due to Infinite Reflection removing Hollow One's cycling ability.
Repeat.

Abandoned Sarcophagus

Infinite Reflection

Hollow One

Cast Flourishing Fox either from your hand or from your graveyard by paying {W}, causing it to enter the battlefield as a copy of Rith's Attendant due to Infinite Reflection.
Activate Flourishing Fox by paying {1} and sacrificing it, adding {R}{G}{W}.
If you cast Flourishing Fox from your graveyard, Flourishing Fox is not exiled by Abandoned Sarcophagus due to Infinite Reflection removing Flourishing Fox's cycling ability.
Repeat.

Flourishing Fox

Cast Wild Dogs either from your hand or from your graveyard by paying {G}, causing it to enter the battlefield as a copy of Rith's Attendant due to Infinite Reflection.
Activate Wild Dogs by paying {1} and sacrificing it, adding {R}{G}{W}.
If you cast Wild Dogs from your graveyard, Wild Dogs is not exiled by Abandoned Sarcophagus due to Infinite Reflection removing Wild Dogs's cycling ability.
Repeat.

Combos with "Rith's Attendant"