Time Sieve + Myr Battlesphere + Teleportation Circle + Thopter Spy Network

Prerequisites

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Steps

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

Effects

• Infinite turns
• Lock