Ancient Den + Clock of Omens + Grinding Station + Prototype Portal

W identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Prototype Portal by paying {0} and tapping it, creating a token copy of Ancient Den.
  2. The Ancient Den token enters, triggering Grinding Station, untapping Grinding Station.
  3. Activate Clock of Omens by tapping the Ancient Den token and Grinding Station, untapping Prototype Portal.
  4. Repeat.

What the combo produces