Battered Golem + Clock of Omens + Prototype Portal + Vault of Whispers

B identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Prototype Portal by paying {0}, creating a token copy of Vault of Whispers.
  2. When the Vault of Whispers token enters the battlefield, Battered Golem triggers, untapping itself.
  3. Activate Clock of Omens by tapping Battered Golem and the Vault of Whispers token, untapping Prototype Portal.
  4. Repeat.

What the combo produces