Time Sieve, Myr Battlesphere, Teleportation Circle, and Tezzeret, Artifice Master

Prerequisites

• Time Sieve on the battlefield
• Myr Battlesphere on the battlefield
• Teleportation Circle on the battlefield
• Tezzeret, Artifice Master on the battlefield

Steps

1. Activate Tezzeret's first loyalty ability by putting a loyalty counter on it, creating a 1/1 Thopter artifact creature token
2. At the beginning of your end step, Teleportation Circle triggers, blinking Myr Battlesphere
3. When Myr Battlesphere enters the battlefield, its first ability triggers, creating four 1/1 Myr artifact creature tokens
4. Activate Time Sieve by tapping it and sacrificing the Myrs and Thopter, causing you to take an extra turn after this one
5. Repeat each turn

Results

• Infinite turns