Retreat to Coralhelm, Cloudstone Curio, and Skyshroud Ranger

Prerequisites

• Retreat to Coralhelm on the battlefield
• Cloudstone Curio on the battlefield
• Skyshroud Ranger on the battlefield
• You have basic land card in hand
• You control at least one basic land
• Skyshroud Ranger does not have summoning sickness

Steps

1. Activate a basic land by tapping it, adding
2. Activate Skyshroud Ranger by tapping it, putting a basic land from your hand onto the battlefield
3. The land enters the battlefield, triggering Retreat to Coralhelm and Cloudstone Curio
4. Resolve the Retreat to Coralhelm trigger, untapping Skyshroud Ranger
5. Resolve the Cloudstone Curio trigger, returning any other basic land from the battlefield to your hand
6. Repeat

Results

• Infinite landfall triggers
• Infinite mana basic lands you control can produce