Emeria Shepherd, World Shaper, Viscera Seer, and Trenching Steed

Prerequisites

• Emeria Shepherd on the battlefield
• World Shaper on the battlefield
• Viscera Seer on the battlefield
• Trenching Steed on the battlefield

Steps

1. Activate Trenching Steed by sacrificing a land
2. Repeat step 1 until you control no lands
3. Activate Viscera Seer by sacrificing World Shaper
4. When World Shaper dies, it triggers, return all lands from your graveyard to the battlefield tapped
5. When the lands enter, Emeria Shepherd triggers that many times
6. Resolve an Emeria Shepherd trigger that was triggered by a Plains, returning World Shaper from your graveyard to the battlefield
7. Resolve all remaining Emeria Shepherd triggers
8. Resolve the Viscera Seer ability
9. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite scry 1
• Infinite self-mill
• Infinite landfall triggers
• Return all nonland permanents from your graveyard to the battlefield