Emeria Shepherd, Aftermath Analyst, Tiller Engine, and Trenching Steed

Prerequisites

• Emeria Shepherd on the battlefield
• Aftermath Analyst on the battlefield
• Tiller Engine on the battlefield
• Trenching Steed on the battlefield

Steps

1. Activate any number of lands by tapping them, adding at least
2. Activate Trenching Steed by sacrificing a land
3. Repeat step 2 until you control no lands
4. Activate Aftermath Analyst by paying and sacrificing it, returning all lands from your graveyard to the battlefield tapped
5. When the lands enter, Emeria Shepherd and Tiller Engine trigger that many times
6. Resolve all Tiller Engine triggers, untapping each land that entered
7. Resolve an Emeria Shepherd trigger that was triggered by a Plains, returning Aftermath Analyst from your graveyard to the battlefield
8. Resolve all other Emeria Shepherd triggers, returning any number of nonland permanents from your graveyard to either your hand or the battlefield
9. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers
• Return all nonland permanents from your graveyard to the battlefield
• Infinite mana lands you control can produce