Time Sieve + Myr Battlesphere + Teleportation Circle + Mondrak, Glory Dominus

Time Sieve

Myr Battlesphere

Teleportation Circle

Mondrak, Glory Dominus

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 Mondrak.
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.

This elegant engine achieves infinite turns by turning your end step into a factory for an overwhelming mechanical horde. It all begins when Teleportation Circle blinks Myr Battlesphere, whose entry trigger is doubled by Mondrak, Glory Dominus to instantly flood your board with eight Myr artifact creature tokens. With those fresh bodies ready to serve, you simply tap Time Sieve and sacrifice five of the tokens to seize an extra turn, repeating the entire sequence once each turn rolls around again.