Derevi, Empyrial Tactician, Cloudstone Curio, and Chromatic Orrery

Prerequisites

• Derevi, Empyrial Tactician on the battlefield
• Cloudstone Curio on the battlefield
• Chromatic Orrery on the battlefield
• You have a nonartifact creature card in hand that can be cast using two mana or less

Steps

1. Activate Chromatic Orrery's first ability by tapping it, adding
2. Cast a nonartifact creature card from your hand by paying at most
3. When the creature enters the battlefield, Cloudstone Curio triggers, returning Derevi from the battlefield to your hand
4. Cast Derevi by paying
5. When Derevi enters the battlefield, it and Cloudstone Curio trigger
6. Resolve the Cloudstone Curio trigger, returning the creature cast in step 2 from the battlefield to your hand
7. Resolve the Derevi trigger, untapping Cloudstone Curio
8. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite colorless mana
• Infinite storm count
• Infinite card draw
• Infinite mana permanents you control can produce
• Infinite untap of permanents you control