Clock of Omens, Myr Turbine, and Grinding Station

Prerequisites

• Clock of Omens on the battlefield
• Myr Turbine on the battlefield
• Grinding Station on the battlefield

Steps

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

Results

• Infinite ETB
• Infinite tapped creature tokens