Emeria Shepherd + World Shaper + Carrion Feeder + Trenching Steed

Emeria Shepherd

World Shaper

Carrion Feeder

Trenching Steed

How it works

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

This ingenious loop turns a graveyard into a self-sustaining engine by letting you repeatedly sacrifice your own real estate to fuel Trenching Steed. Once your lands are binned, sacrificing World Shaper to Carrion Feeder triggers World Shaper's death ability to flood the battlefield with those lands all at once. This massive wave of land entries triggers Emeria Shepherd multiple times, allowing you to bypass your hand and drop World Shaper straight back onto the battlefield while returning any other nonland permanents you desire.