Springheart Nantuko, Selesnya Sanctuary, Wayward Swordtooth, and Amulet of Vigor

Prerequisites

• Springheart Nantuko on the battlefield
• Selesnya Sanctuary in hand
• Wayward Swordtooth on the battlefield
• Amulet of Vigor on the battlefield

Steps

1. Play Selesnya Sanctuary
2. When it enters, Amulet of Vigor, Selesnya Sanctuary and Springheart Nantuko trigger
3. Resolve the Amulet of Vigor trigger, untapping Selesnya Sanctuary
4. Holding priority, activate Selesnya Sanctuary by tapping it, adding
5. Resolve the Selesnya Sanctuary trigger, returning it from the battlefield to your hand
6. Resolve the Springheart Nantuko trigger, causing you to pay to create a token copy of Wayward Swordtooth
7. Because of the additional Wayward Swordtooth token, you can play an additional land this turn
8. Repeat

Results

• Infinite creature tokens
• Infinite landfall triggers
• Infinite ETB