Cloudstone Curio Infinite Commander Casts

Step 1: Have Cloudstone Curio, Myth Unbound, Commodore Guff, and Graxiplon on the battlefield.

Step 2: Cast Commodore Guff from the command zone.

Step 3: Use Cloudstone Curio to bounce Graxiplon (or another nonartifact creature) back to your hand.

Step 4: Cast Graxiplon, using Cloudstone Curio to bounce Commodore Guff back to your hand.

Step 5: Repeat steps 2-4. Each time you cast Commodore Guff, draw a card from Myth Unbound and deal damage to each opponent.

Step 6: Continue the loop to draw your entire deck and deal infinite damage to opponents.