Patron of the Moon, Spelunking, and Boros Garrison

Prerequisites

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

Steps

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

Results

• Infinite landfall triggers
• Infinite red mana
• Infinite white mana
• Infinite card draw
• Infinite draw triggers