Ancient Greenwarden, Mina and Denn, Wildborn, Retreat to Coralhelm, Nissa, Resurgent Animist, and Walking Atlas

Prerequisites

• Ancient Greenwarden on the battlefield
• Mina and Denn, Wildborn on the battlefield
• Retreat to Coralhelm on the battlefield
• Nissa, Resurgent Animist on the battlefield
• Walking Atlas on the battlefield
• Walking Atlas does not have summoning sickness
• You have a land card in hand that enters the battlefield untapped

Steps

1. Activate Walking Atlas by tapping it, putting a land from your hand onto the battlefield
2. The land enters the battlefield, triggering Nissa and Retreat to Coralhelm twice
3. Resolve both Nissa triggers, adding
4. Resolve both Retreat to Coralhelm triggers, untapping Walking Atlas and choosing either to untap another creature or scry 1
5. Activate a land by tapping it, adding at least
6. Activate Mina and Denn by paying and returning a land from the battlefield to your hand, giving a creature trample until end of turn
7. Repeat

Results

• Infinite colored mana
• Infinite landfall triggers
• Infinite mana creatures you control can produce
• Infinite scry 1
• Infinite untap of creatures you control