Patron of the Moon, Amulet of Vigor, and Gruul Turf

Prerequisites

• Patron of the Moon on the battlefield
• Amulet of Vigor on the battlefield
• Gruul Turf in hand
• available

Steps

1. Activate Patron of the Moon by paying , putting Gruul Turf from your hand onto the battlefield
2. When Gruul Turf enters the battlefield, it and Amulet of Vigor trigger
3. Resolve the Amulet of Vigor trigger, untapping Gruul Turf
4. Activate Gruul Turf by tapping it, adding
5. Resolve the Gruul Turf trigger from step 2, returning it from the battlefield to your hand
6. Repeat

Results

• Infinite green mana
• Infinite landfall triggers
• Infinite red mana