Time Sieve, Myr Battlesphere, Teleportation Circle, and Mishra, Eminent One

Prerequisites

• Time Sieve on the battlefield
• Myr Battlesphere on the battlefield
• Teleportation Circle on the battlefield
• Mishra, Eminent One on the battlefield

Steps

1. At the beginning of your combat phase, Mishra triggers, creating a 4/4 Mishra's Warform artifact creature token
2. At the beginning of your end step, Mishra and Teleportation Circle triggers
3. Resolve the Teleportation Circle trigger, blinking Myr Battlesphere
4. When Myr Battlesphere enters the battlefield, its first ability triggers, creating four 1/1 Myr artifact creature tokens
5. Activate Time Sieve by tapping it and sacrificing the Myrs and Mishra's Warform, causing you to take an extra turn after this one
6. Resolve the Mishra trigger, failing to sacrifice the Mishra's Warform token due to it no longer being on the battlefield
7. Repeat each turn

Results

• Infinite turns