Cloudstone Curio, Hornet Queen, Mana Echoes, and Chromatic Orrery

Prerequisites

• Cloudstone Curio on the battlefield
• Hornet Queen in hand
• Mana Echoes on the battlefield
• Chromatic Orrery on the battlefield
• available

Steps

1. Activate Chromatic Orrery's first ability by tapping it, adding
2. Cast Hornet Queen by paying
3. Hornet Queen enters the battlefield, triggering itself, Cloudstone Curio, and Mana Echoes
4. Resolve the Cloudstone Curio trigger, returning nothing to your hand from the battlefield
5. Resolve the Hornet Queen trigger, creating four 1/1 Insect creature tokens with flying and deathtouch
6. The Insects enter the battlefield, triggering Mana Echoes four times and Cloudstone Curio four times
7. Resolve the first Cloudstone Curio trigger, returning Hornet Queen from the battlefield to your hand
8. Resolve all remaining Cloudstone Curio triggers, returning nothing to your hand from the battlefield
9. Resolve all Mana Echoes triggers, adding for each Insect you control
10. Repeat from step 2

Results

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