Cloudstone Curio, Energy Refractor, Hornet Queen, and Mana Echoes

Prerequisites

• Cloudstone Curio on the battlefield
• Energy Refractor on the battlefield
• Hornet Queen in hand
• Mana Echoes on the battlefield
• available

Steps

1. Cast Hornet Queen by paying
2. When Hornet Queen enters the battlefield, it, Cloudstone Curio, and Mana Echoes trigger
3. Resolve the Cloudstone Curio trigger, returning nothing to your hand from the battlefield
4. Resolve the Hornet Queen trigger, creating four 1/1 Insect creature tokens
5. When the Insects enter the battlefield, Mana Echoes and Cloudstone Curio each trigger four times
6. Resolve the first Cloudstone Curio trigger, returning Hornet Queen from the battlefield to your hand
7. Resolve all remaining Cloudstone Curio triggers, returning nothing to your hand from the battlefield
8. Resolve all Mana Echoes triggers, adding for each Insect you control
9. Activate Energy Refractor three times by paying , adding
10. Repeat

Results

• Infinite colored mana
• Infinite colorless mana
• Infinite creature tokens
• Infinite ETB
• Infinite LTB
• Infinite storm count