Battered Golem + Clock of Omens + Great Furnace + Prototype Portal

R identity

Commander legal

The 4 combo pieces

How to execute it

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

What the combo produces