Initial Card State
- All permanents on the battlefield.
Steps
- At the beginning of your end step, Teleportation Circle and Urza trigger.
- Resolve the Urza trigger, creating a 0/0 Construct creature token.
- 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 Construct, causing you to take an extra turn after this one.
- Repeat each turn.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).