Zimone, Quandrix Prodigy, Retreat to Coralhelm, Tiller Engine, and Dimir Aqueduct

Prerequisites

• Zimone, Quandrix Prodigy on the battlefield
• Retreat to Coralhelm on the battlefield
• Tiller Engine on the battlefield
• Dimir Aqueduct in hand
• available

Steps

1. Activate Zimone's first ability by paying and tapping it, putting Dimir Aqueduct from your hand onto the battlefield untapped due to When Dimir Aqueduct enters the battlefield, it, Tiller Engine and Retreat to Coralhelm trigger
2. Resolve the Tiller Engine trigger, untapping Dimir Aqueduct Holding priority, activate Dimir Aqueduct by tapping it, adding
3. Resolve the Dimir Aqueduct trigger from step 2, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Zimone
5. Repeat

Results

• Infinite blue mana
• Infinite black mana
• Infinite landfall triggers