Urza, Chief Artificer + Time Sieve + Myr Battlesphere + Teleportation Circle

Urza, Chief Artificer

Time Sieve

Myr Battlesphere

Teleportation Circle

How it works

1. At the beginning of your end step, Teleportation Circle and Urza trigger.
2. Resolve the Urza trigger, creating a 0/0 Construct creature token.
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 Construct, causing you to take an extra turn after this one.
6. Repeat each turn.

This clever loop chains together end-step triggers and artifact generation to take all the time in the world. As your turn winds down, Urza, Chief Artificer sets the foundation by brewing a growing Construct token, while Teleportation Circle swoops in to blink Myr Battlesphere. That blink drops a fresh batch of four Myr tokens onto the battlefield alongside the Battlesphere itself, easily feeding the five-artifact sacrifice cost required by Time Sieve to immediately secure an extra turn.