Quirion Ranger, Elvish Pioneer, Cloudstone Curio, and Llanowar Tribe

Prerequisites

• Quirion Ranger in hand
• Elvish Pioneer on the battlefield
• Cloudstone Curio on the battlefield
• Llanowar Tribe on the battlefield
• You control a basic Forest
• Llanowar Tribe does not have summoning sickness

Steps

1. Activate Llanowar Tribe by tapping it, adding
2. Cast Quirion Ranger by paying
3. Quirion Ranger enters the battlefield, triggering Cloudstone Curio, returning Elvish Pioneer from the battlefield to your hand
4. Activate Quirion Ranger by returning a basic Forest from the battlefield to your hand, untapping Llanowar Tribe
5. Cast Elvish Pioneer by paying
6. Elvish Pioneer enters the battlefield, triggering itself and Cloudstone Curio
7. Resolve the Elvish Pioneer trigger, putting a basic Forest from your hand onto the battlefield tapped
8. Resolve the Cloudstone Curio trigger, returning Quirion Ranger from the battlefield to your hand
9. Repeat

Results

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