Astral Cornucopia + Rings of Brighthearth + Voltaic Key

C identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Astral Cornucopia by tapping it, adding at least four mana of any color.
  2. Activate Voltaic Key by paying {1} and tapping it, targeting itself.
  3. Rings of Brighthearth triggers, causing you to pay {2} to copy Voltaic Key's ability, targeting Astral Cornucopia.
  4. Resolve both Voltaic Key abilities, untapping it and Astral Cornucopia.
  5. Repeat.

What the combo produces