Kodama of the East Tree + Petrified Field + Echoing Deeps + Stone-Seeder Hierophant + Down in the Valley

Kodama of the East Tree

Petrified Field

Echoing Deeps

Stone-Seeder Hierophant

Down in the Valley

How it works

1. Play Petrified Field.
2. When Petrified Field enters the battlefield, Kodama of the East Tree and Down in the Valley 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 Down in the Valley 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 as a copy of Petrified Field.
7. When Echoing Deeps enters the battlefield, Down in the Valley and Stone-Seeder Hierophant trigger.
8. Resolve the Stone-Seeder Hierophant trigger, untapping Echoing Deeps.
9. 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.
10. Resolve the Down in the Valley trigger, creating a token.
11. When the token enters the battlefield, Kodama of the East Tree triggers, putting Petrified Field from your hand onto the battlefield.
12. When Petrified Field enters the battlefield, Down in the Valley triggers.
13. Repeat from step 4.

This clever loop is orchestrated by Kodama of the East Tree, whose trigger continuously sneaks permanents from your hand into play whenever another permanent enters the battlefield. Down in the Valley plays a crucial supporting role by providing the necessary creature tokens for those entry triggers, while Stone-Seeder Hierophant keeps your mana engine churning by untapping your lands on each landfall. The true beauty of the loop lies in the graveyard tango between Petrified Field and Echoing Deeps: by sacrificing one to pull the other back from the graveyard, Echoing Deeps can continuously copy Petrified Field to sustain the endless cycle of sacrifice and retrieval.