Time Sieve + Myr Battlesphere + Teleportation Circle + Parallel Lives

Time Sieve

Myr Battlesphere

Teleportation Circle

Parallel Lives

How it works

1. At the beginning of your end step, Teleportation Circle triggers, blinking Myr Battlesphere.
2. When Myr Battlesphere enters the battlefield, its first ability triggers, creating eight 1/1 Myr artifact creature tokens due to Parallel Lives.
3. Activate Time Sieve by tapping it and sacrificing five Myrs, causing you to take an extra turn after this one.
4. Repeat each turn.