Patron of the Moon, Boros Garrison, and Tiller Engine

Prerequisites

• Patron of the Moon on the battlefield
• Boros Garrison in hand
• Tiller Engine on the battlefield
• available

Steps

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

Results

• Infinite red mana
• Infinite white mana
• Infinite landfall triggers