Emeria Shepherd + World Shaper + Ashnod's Altar + Coastal Hornclaw

Emeria Shepherd

World Shaper

Ashnod's Altar

Coastal Hornclaw

How it works

1. Activate Coastal Hornclaw by sacrificing a land.
2. Repeat step 1 until you control no lands.
3. Activate Ashnod's Altar 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. Repeat

This ingenious engine feeds on your own lands, using Coastal Hornclaw's activated ability to steadily sacrifice every land you control until your battlefield is entirely cleared of them. With the board stripped bare, you sacrifice World Shaper to Ashnod's Altar for a surge of colorless mana, triggering its death ability to flood your graveyard full of lands right back onto the battlefield tapped. That massive wave of land drops awakens Emeria Shepherd's landfall ability for each entering land—and since those lands include Plains, the Shepherd effortlessly plucks World Shaper right back from the graveyard to the battlefield, leaving you with endless sacrifice loops and an entirely recycled board.