Retreat to Coralhelm, Storm Cauldron, and Sakura-Tribe Scout

Prerequisites

• Retreat to Coralhelm on the battlefield
• Storm Cauldron on the battlefield
• Sakura-Tribe Scout on the battlefield
• You have a basic land in hand
• Sakura-Tribe Scout does not have summoning sickness

Steps

1. Activate Sakura-Tribe Scout by tapping it, putting a basic land from your hand onto the battlefield
2. The land enters the battlefield, triggering Retreat to Coralhelm, untapping Sakura-Tribe Scout
3. Activate the basic land by tapping it, adding
4. Storm Cauldron triggers, returning the basic land from your battlefield to your hand
5. Repeat

Results

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