Time Sieve, Encroaching Mycosynth, Helm of the Host, and Evangel of Heliod

Prerequisites

• Time Sieve on the battlefield
• Encroaching Mycosynth on the battlefield
• Helm of the Host on the battlefield
• Evangel of Heliod on the battlefield
• Helm of the Host attached to Evangel of Heliod
• Your devotion to white is at least four

Steps

1. At the beginning of your combat phase, Helm of the Host triggers, creating a token copy of Evangel of Heliod with haste
2. When the Evangel of Heliod token enters the battlefield, it triggers, creating a number of 1/1 Soldier creature tokens equal to your devotion to white
3. Activate Time Sieve by tapping it and sacrificing five creature tokens, causing you to take an extra turn after this one
4. Repeat each turn

Results

• Infinite turns