Romana II, Mutable Explorer, Retreat to Coralhelm, and Stone-Seeder Hierophant

Prerequisites

• Romana II on the battlefield
• Mutable Explorer in hand
• Retreat to Coralhelm on the battlefield
• Stone-Seeder Hierophant on the battlefield
• available

Steps

1. Cast Mutable Explorer by paying
2. When Mutable Explorer enters the battlefield, it triggers, creating a tapped Mutavault land token
3. When the Mutavault token enters the battlefield, Stone-Seeder Hierophant and Retreat to Coralhelm trigger
4. Reoslve the Stone-Seeder Hierophant trigger, untapping it
5. Resolve the Retreat to Coralhelm trigger, untapping Romana II
6. Activate Stone-Seeder Hierophant by tapping it, untapping the Mutavault token
7. Activate the Mutavault token by tapping it, adding
8. Activate Romana II by paying and tapping it, creating a tapped copy of the Mutavault token
9. Repeat from step 3

Results

• Infinite landfall triggers
• Infinite tapped Forest tokens
• Infinite tapped Island tokens
• Infinite tapped Mountain tokens
• Infinite tapped Plains tokens
• Infinite tapped Swamp tokens
• Infinite tapped copies of a specific land