Miirym, Sentinel Wyrm, Cloudstone Curio, Sneak Attack, and Thermopod

Prerequisites

• Miirym, Sentinel Wyrm on the battlefield
• Cloudstone Curio on the battlefield
• Sneak Attack on the battlefield
• Thermopod on the battlefield
• You have a nonartifact Dragon creature card in hand
• available

Steps

1. Activate Sneak Attack by paying , putting any Dragon from your hand onto the battlefield
2. The Dragon 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 the Dragon
5. The token Dragon enters the battlefield, triggering Cloudstone Curio, returning the nontoken Dragon from the battlefield to your hand
6. Activate Thermopod's second ability by sacrificing the Dragon token, adding
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers