Emeria Shepherd + World Shaper + Thaumatog + Phantom Train

Emeria Shepherd

World Shaper

Thaumatog

Phantom Train

How it works

1. Activate Thaumatog by sacrificing a land.
2. Repeat step 1 until you control no lands.
3. Activate Phantom Train 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 Phantom Train ability.
9. Repeat

This ingenious loop turns your graveyard into a perpetual engine by using Thaumatog to systematically sacrifice every land you control. Once your land base is entirely in the graveyard, you feed World Shaper to Phantom Train; World Shaper's death trigger then dumps all those lands back onto the battlefield at once. Because Emeria Shepherd watches for landfalls and conveniently pulls World Shaper right back from the graveyard whenever a Plains drops, the whole cycle resets seamlessly.