Clock of Omens + Myr Turbine + Grinding Station

Clock of Omens

Myr Turbine

Grinding Station

How it works

1. Activate Myr Turbine's first ability by tapping it, creating a 1/1 Myr artifact creature token.
2. The Myr enters the battlefield, triggering Grinding Station, untapping Grinding Station.
3. Activate Clock of Omens by tapping the Myr and Grinding Station, untapping Myr Turbine.
4. Repeat.