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

Time Sieve

Myr Battlesphere

Teleportation Circle

Tezzeret, Artifice Master

How it works

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.

This magnificent mechanical loop harnesses the relentless creation of artifacts to bend time itself, chaining extra turns indefinitely. By using Tezzeret, Artifice Master's loyalty ability to churn out a Thopter alongside the four Myrs brought by Myr Battlesphere's entrance, you easily stockpile the five artifacts required to fuel Time Sieve. Meanwhile, Teleportation Circle acts as the perpetual engine, constantly resetting the Battlesphere at your end step to replenish your sacrifice fodder turn after turn.