Yedora, Grave Gardener, Ambush Commander, and Trenching Steed

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Ambush Commander on the battlefield
• Trenching Steed on the battlefield
• You control at least one additional nontoken Forest

Steps

1. Activate Trenching Steed 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. Resolve the Trenching Steed ability
4. Repeat

Results

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