Romana II, Mutable Explorer, Retreat to Coralhelm, and Nissa, Resurgent Animist

Prerequisites

• Romana II on the battlefield
• Mutable Explorer in hand
• Retreat to Coralhelm on the battlefield
• Nissa, Resurgent Animist 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, Nissa and Retreat to Coralhelm trigger
4. Reoslve the Nissa trigger, adding
5. Resolve the Retreat to Coralhelm trigger, untapping Romana II
6. Activate Romana II by paying and tapping it, creating a tapped copy of the Mutavault token
7. 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