Kodama of the East Tree + Petrified Field + Echoing Deeps + Elfsworn Giant + Horizon Explorer

Kodama of the East Tree

Petrified Field

Echoing Deeps

Elfsworn Giant

Horizon Explorer

How it works

1. Play Petrified Field.
2. When Petrified Field enters the battlefield, Kodama of the East Tree and Elfsworn Giant 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 Elfsworn Giant 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, Elfsworn Giant 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 Elfsworn Giant 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, Elfsworn Giant triggers.
12. Repeat from step 4.

This loop relies on an infinite recursive dance between lands and tokens, supercharged by the passive presence of Horizon Explorer to ensure your entering lands never stall out tapped. Kodama of the East Tree acts as the engine's heart, using every landfall-generated token from Elfsworn Giant to smuggle a land card straight from your hand onto the battlefield. Meanwhile, Petrified Field and Echoing Deeps endlessly trade places from the graveyard back to your hand, sacrificing themselves to retrieve each other while perpetually feeding the loop with new triggers.