Patron of the Moon, Izzet Boilerworks, and Horizon Explorer

Prerequisites

• Patron of the Moon on the battlefield
• Izzet Boilerworks in hand
• Horizon Explorer on the battlefield
• available

Steps

1. Pay to activate Patron of the Moon, putting Izzet Boilerworks from your hand onto the battlefield untapped due to Horizon Explorer
2. When Izzet Boilerworks enters, it triggers
3. Activate Izzet Boilerworks by tapping it, adding two mana
4. Resolve Izzet Boilerworks's triggered ability, returning it from the battlefield to your hand
5. Repeat

Results

• Infinite blue mana
• Infinite landfall triggers
• Infinite red mana