Clock of Omens + Grinding Station + Prototype Portal + Vault of Whispers

B 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 Vault of Whispers.
  2. The Vault of Whispers token enters, triggering Grinding Station, untapping Grinding Station.
  3. Activate Clock of Omens by tapping the Vault of Whispers token and Grinding Station, untapping Prototype Portal.
  4. Repeat.

What the combo produces