Yedora, Grave Gardener, Ambush Commander, and Sylvan Safekeeper

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Ambush Commander on the battlefield
• Sylvan Safekeeper on the battlefield

Steps

1. Activate Sylvan Safekeeper by sacrificing a nontoken Forest, which is a creature due to Ambush Commander
2. When the Forest dies, Yedora triggers, returning the Forest from your graveyard to the battlefield face down as a Forest land
3. Repeat
4. Resolve all Sylvan Safekeeper abilities

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers