Tameshi, Reality Architect, Walking Atlas, Retreat to Coralhelm, and Lotus Petal

Prerequisites

• Tameshi, Reality Architect on the battlefield
• Walking Atlas on the battlefield
• Retreat to Coralhelm on the battlefield
• Lotus Petal in the graveyard
• You control a land that enters the battlefield untapped and can tap to produce at least
• Walking Atlas does not have summoning sickness

Steps

1. Activate any land by tapping it, adding at least
2. Activate Tameshi's ability by paying and returning the land from the battlefield to your hand, returning Lotus Petal from your graveyard to the battlefield
3. Activate Walking Atlas by tapping it, putting the land from your hand onto the battlefield
4. Retreat to Coralhelm triggers, untapping Walking Atlas
5. Activate Lotus Petal by tapping and sacrificing it, adding one mana of any color
6. Repeat

Results

• Infinite colored mana
• Infinite landfall triggers