Experiment Kraj, Trench Behemoth, and Walking Atlas

Prerequisites

• Experiment Kraj on the battlefield
• Trench Behemoth on the battlefield
• Walking Atlas on the battlefield
• You have at least one land card in hand
• Experiment Kraj does not have summoning sickness
• Trench Behemoth and Walking Atlas each have at least one +1/+1 counter on them

Steps

1. Activate Experiment Kraj using Walking Atlas's ability by tapping it, putting a land from your hand onto the battlefield
2. If the land is mana-producing and enters the battlefield untapped, you may activate it by tapping it, adding at least
3. Activate Experiment Kraj using Trench Behemoth's ability by returning the land from the battlefield to your hand, untapping Experiment Kraj
4. Repeat

Results

• Infinite landfall triggers
• Infinite mana lands you control that enter the battlefield untapped can produce