Emeria Shepherd + Lumra, Bellow of the Woods + Need for Speed

Emeria Shepherd

Lumra, Bellow of the Woods

Need for Speed

How it works

1. Cast Lumra by paying 4.
2. When Lumra enters, it triggers.
3. Holding priority, activate Need for Speed by sacrificing a land.
4. Repeat step 3 until you control no lands.
5. When you sacrifice the last land, Lumra will die as a state-based action due to having 0 toughness.
6. Resolve the Lumra trigger from step 2, causing you to mill four cards and return all lands from your graveyard to the battlefield tapped.
7. When the lands enter, Emeria Shepherd triggers that many times.
8. Resolve an Emeria Shepherd trigger that was triggered by a Plains, returning Lumra from your graveyard to the battlefield.
9. Repeat from step 2.

This recursive engine turns your graveyard into a full-board launcher by feeding Lumra, Bellow of the Woods to Need for Speed's sacrifice ability until Lumra's toughness shrinks to zero. When Lumra enters the battlefield, it mills cards and fires off its own return-all-lands trigger, which floods the board with freshly returned lands and triggers Emeria Shepherd over and over. Because those returning lands include Plains, Emeria Shepherd's landfall ability cheats Lumra straight back out of the graveyard to reset the whole loop.