Astral Cornucopia + Eternal Witness + Hashaton, Scarab's Fist + Mind Over Matter

GWUB identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Astral Cornucopia by tapping it, adding at least {U}{U}{U}.
  2. Activate Mind Over Matter by discarding Eternal Witness.
  3. Hashaton triggers, causing you to pay {2}{U} to create a tapped token copy of Eternal Witness that is a 4/4 Zombie.
  4. When the Eternal Witness token enters the battlefield, it triggers, returning Eternal Witness from your graveyard to your hand.
  5. Resolve the Mind Over Matter ability, untapping Astral Cornucopia.
  6. Repeat.

What the combo produces