Kodama of the East Tree + Petrified Field + Echoing Deeps + Sarinth Greatwurm + Horizon Explorer

Kodama of the East Tree

Petrified Field

Echoing Deeps

Sarinth Greatwurm

Horizon Explorer

How it works

1. Play Petrified Field.
2. When Petrified Field enters the battlefield, Kodama of the East Tree and Sarinth Greatwurm trigger.
3. Resolve the Kodama of the East Tree trigger, putting nothing onto the battlefield.
4. Holding priority, activate Petrified Field's second ability by tapping and sacrificing it, returning Echoing Deeps from your graveyard to your hand.
5. Resolve the Sarinth Greatwurm trigger, creating a token.
6. When the token enters the battlefield, Kodama of the East Tree triggers, putting Echoing Deeps from your hand onto the battlefield untapped as a copy of Petrified Field.
7. When Echoing Deeps enters the battlefield, Sarinth Greatwurm triggers.
8. Holding priority, activate Echoing Deeps using Petrified Field's second ability by tapping and sacrificing it, returning Petrified Field from your graveyard to your hand.
9. Resolve the Sarinth Greatwurm trigger, creating a token.
10. When the token enters the battlefield, Kodama of the East Tree triggers, putting Petrified Field from your hand onto the battlefield.
11. When Petrified Field enters the battlefield, Sarinth Greatwurm triggers.
12. Repeat from step 4.

This infinite recursion engine relies on the interplay between Petrified Field and Echoing Deeps to constantly swap places from the battlefield to your hand and back again, fueled entirely by the land-drop triggers caught by Kodama of the East Tree. As long as Sarinth Greatwurm is on the battlefield to generate tokens off each new land entering, Kodama's triggered ability steps in to drop the land waiting in your hand, while Horizon Explorer ensures your entering lands don't slow you down by arriving tapped. The result is an unstoppable loop that nets you as many landfall triggers and tapped Powerstone tokens as your heart desires!