Lathliss, Dragon Queen, Cloudstone Curio, Arcane Adaptation, and Crimson Kobolds

Prerequisites

• Lathliss, Dragon Queen on the battlefield
• Cloudstone Curio on the battlefield
• Arcane Adaptation on the battlefield
• Crimson Kobolds in hand
• "Dragon" chosen with Arcane Adaptation

Steps

1. Cast Crimson Kobolds by paying
2. When Crimson Kobolds enters the battlefield, Lathliss and Cloudstone Curio triggers
3. Resolve the Cloudstone Curio trigger, returning nothing to your hand
4. Resolve the Lathliss trigger, creating a 5/5 Dragon creature token
5. When the Dragon enters the battlefield, Cloudstone Curio triggers, returning Crimson Kobolds from the battlefield to your hand
6. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite LTB
• Infinite storm count