Ancient Greenwarden, Mina and Denn, Wildborn, Lotus Cobra, Retreat to Coralhelm, and Skyshroud Ranger

Prerequisites

• Ancient Greenwarden on the battlefield
• Mina and Denn, Wildborn on the battlefield
• Lotus Cobra on the battlefield
• Retreat to Coralhelm on the battlefield
• Skyshroud Ranger on the battlefield
• You have a land card in hand
• Skyshroud Ranger does not have summoning sickness

Steps

1. Activate Skyshroud Ranger by tapping it, putting a land from your hand onto the battlefield
2. The land enters the battlefield, triggering Lotus Cobra and Retreat to Coralhelm twice
3. Resolve both Lotus Cobra triggers, adding
4. Resolve the first Retreat to Coralhelm trigger, causing you to either tap or untap a creature, or scry 1
5. Resolve the second Retreat to Coralhelm trigger, untapping Skyshroud Ranger
6. Activate Mina and Denn by paying and returning the land from the battlefield to your hand, giving target creature trample until end of turn
7. Repeat

Results

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