Time Sieve, Myr Battlesphere, and Helm of the Host

Prerequisites

• Time Sieve on the battlefield
• Myr Battlesphere on the battlefield
• Helm of the Host on the battlefield
• Helm of the Host attached to Myr Battlesphere

Steps

1. At the beginning of your combat phase, Helm of the Host triggers, creating a token copy of Myr Battlesphere with haste
2. The Myr Battlesphere token enters the battlefield, creating four 1/1 Myr creature tokens
3. Activate Time Sieve by tapping it, sacrificing the Myr Battlesphere token and sacrificing the four Myr tokens, causing you to take an extra turn after this one
4. Repeat each turn

Results

• Infinite turns