Circle of Dreams Druid, Cloudstone Curio, Elvish Pioneer, and Quirion Ranger

Prerequisites

• Circle of Dreams Druid on the battlefield
• Cloudstone Curio on the battlefield
• Elvish Pioneer on the battlefield
• Quirion Ranger in hand
• You control a basic Forest
• Circle of Dreams Druid does not have summoning sickness
• available

Steps

1. Cast Quirion Ranger by paying
2. Quirion Ranger enters the battlefield, triggering Cloudstone Curio
3. Holding priority, activate Circle of Dreams Druid by tapping it, adding at least
4. Resolve the Cloudstone Curio trigger, returning Elvish Pioneer from the battlefield to your hand
5. Activate Quirion Ranger by returning a basic Forest from the battlefield to your hand, untapping Circle of Dreams Druid
6. Cast Elvish Pioneer by paying
7. Elvish Pioneer enters the battlefield, triggering itself and Cloudstone Curio
8. Resolve the Elvish Pioneer trigger, putting a basic Forest from your hand onto the battlefield tapped
9. Resolve the Cloudstone Curio trigger, returning Quirion Ranger from the battlefield to your hand
10. Repeat

Results

• Infinite ETB
• Infinite green mana
• Infinite landfall triggers
• Infinite LTB
• Infinite storm count
• Infinite untap of creatures you control