Archelos, Lagoon Mystic + Zimone, Quandrix Prodigy + Retreat to Coralhelm + Dimir Aqueduct

Archelos, Lagoon Mystic
Zimone, Quandrix Prodigy
Retreat to Coralhelm
Dimir Aqueduct

Requires
Dimir Aqueduct in hand. All other permanents on the battlefield. Zimone does not have summoning sickness. Archelos is untapped. 1 available.
Steps
  1. Activate Zimone's first ability by paying 1 and tapping it, putting Dimir Aqueduct from your hand onto the battlefield untapped due to Archelos
  2. Dimir Aqueduct enters the battlefield, triggering itself and Retreat to Coralhelm
  3. Activate Dimir Aqueduct by tapping it, adding ub
  4. Resolve the Dimir Aqueduct trigger from step 2, returning itself from the battlefield to your hand
  5. Resolve the Retreat to Coralhelm trigger, untapping Zimone
  6. Repeat
Results
Infinite blue mana. Infinite black mana. Infinite landfall triggers.