Springheart Nantuko, Gruul Turf, Wayward Swordtooth, and Spelunking

Prerequisites

• Springheart Nantuko on the battlefield
• Gruul Turf in hand
• Wayward Swordtooth on the battlefield
• Spelunking on the battlefield

Steps

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

Results

• Infinite creature tokens
• Infinite landfall triggers
• Infinite ETB