Patron of the Moon, Dimir Aqueduct, and Tiller Engine

Prerequisites

• Patron of the Moon on the battlefield
• Dimir Aqueduct in hand
• Tiller Engine on the battlefield
• available

Steps

1. Pay to activate Patron of the Moon, putting Dimir Aqueduct from your hand onto the battlefield
2. When Dimir Aqueduct enters, it and Tiller Engine each trigger
3. Resolve Tiller Engine's ability, untapping Dimir Aqueduct
4. Activate Dimir Aqueduct by tapping it, adding two mana
5. Resolve Dimir Aqueduct's triggered ability, returning it from the battlefield to your hand
6. Repeat

Results

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