Cloudstone Curio + Miirym, Sentinel Wyrm + Mothdust Changeling + Phyrexian Altar

Mana needed: {U}

GUR identity

Commander legal

The 4 combo pieces

How to execute it

  1. Cast Mothdust Changeling by paying {U}.
  2. Mothdust Changeling enters the battlefield, triggering Cloudstone Curio and Miirym.
  3. Resolve the Cloudstone Curio trigger, choosing not to return anything to your hand from the battlefield.
  4. Resolve the Miirym trigger, creating a token copy of Mothdust Changeling.
  5. The Mothdust Changeling token enters the battlefield, triggering Cloudstone Curio, returning the nontoken Mothdust Changeling from the battlefield to your hand.
  6. Activate Phyrexian Altar by sacrificing the Mothdust Changeling token, adding {U}.
  7. Repeat.

What the combo produces