How can you create a combo with Archelos, Lagoon Mystic, Zimone, Quandrix Prodigy, Retreat to Coralhelm, Guildless Commons?
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[START OF COMBO]This combo can be formed with Archelos, Lagoon Mystic, Zimone, Quandrix Prodigy, Retreat to Coralhelm, Guildless Commons

Color identity: BGU
Mana cost: {1}
Steps:
  1. Activate Zimone's first ability by paying {1} and tapping it, putting Guildless Commons from your hand onto the battlefield untapped due to Archelos.
  2. Guildless Commons enters the battlefield, triggering itself, Amulet of Vigor and Retreat to Coralhelm.
  3. Activate Guildless Commons by tapping it, adding {C}{C}.
  4. Resolve the Guildless Commons trigger from step 2, returning itself from the battlefield to your hand.
  5. Resolve the Retreat to Coralhelm trigger, untapping Zimone.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite landfall triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Archelos, Lagoon Mystic must be on the battlefield
  - Zimone, Quandrix Prodigy must be on the battlefield
  - Retreat to Coralhelm must be on the battlefield
  - Guildless Commons must be in your hand
  - Zimone does not have summoning sickness.
  - Archelos is untapped.
[END OF COMBO PREREQUISITES]
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