Emeria Shepherd, World Shaper, Carrion Feeder, and Trenching Steed

Prerequisites

• Emeria Shepherd on the battlefield
• World Shaper on the battlefield
• Carrion Feeder 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 Carrion Feeder 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 Carrion Feeder ability
9. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite self-mill
• Infinite landfall triggers
• Infinite +1/+1 counters on Carrion Feeder
• Return all nonland permanents from your graveyard to the battlefield