Lathliss, Dragon Queen, Changeling Outcast, Cloudstone Curio, and Phyrexian Altar

Prerequisites

• Lathliss, Dragon Queen on the battlefield
• Changeling Outcast in hand
• Cloudstone Curio on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast Changeling Outcast by paying
2. Changeling Outcast enters the battlefield, triggering Cloudstone Curio and Lathliss
3. Resolve the Cloudstone Curio trigger, choosing not to return anything to your hand from the battlefield
4. Resolve the Lathliss trigger, creating a 5/5 Dragon creature token
5. The Dragon enters the battlefield, triggering Cloudstone Curio, returning Changeling Outcast from the battlefield to your hand
6. Activate Phyrexian Altar by sacrificing the Dragon token, adding
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count