Time Sieve, Mycosynth Lattice, Rionya, Fire Dancer, and Avenger of Zendikar

Prerequisites

• Time Sieve on the battlefield
• Mycosynth Lattice on the battlefield
• Rionya, Fire Dancer on the battlefield
• Avenger of Zendikar on the battlefield
• You control at least four lands

Steps

1. At the beginning of your combat phase, Rionya triggers, creating at least one token copy of Avenger of Zendikar with haste
2. When the Avenger of Zendikar token enters the battlefield, its first ability triggers, creating at least four 0/1 Plant creature tokens
3. Activate Time Sieve by tapping it, sacrificing the Avenger of Zendikar token and the Plant tokens, causing you to take an extra turn after this one
4. Repeat each turn

Results

• Infinite turns