Time Sieve | Myr Battlesphere | Teleportation Circle

(and one other card)

At the beginning of your combat phase,
Mishra triggers, creating a 4/4
Mishra's Warform artifact creature token.
At the beginning of your end step,
Mishra and
Teleportation Circle triggers.
Resolve the
Teleportation Circle trigger, blinking
Myr Battlesphere.
When
Myr Battlesphere enters the battlefield, its first ability triggers, creating four 1/1 Myr artifact creature tokens.
Activate
Time Sieve by tapping it and sacrificing the Myrs and
Mishra's Warform, causing you to take an extra turn after this one.
Resolve the
Mishra trigger, failing to sacrifice the
Mishra's Warform token due to it no longer being on the battlefield.
Repeat each turn.