When Orzhov Basilica enters the battlefield, it, Sarinth Greatwurm, and Kodama of the East Tree trigger.
Resolve the Kodama of the East Tree trigger, choosing not to put anything from your hand onto the battlefield.
Resolve the Orzhov Basilica trigger, returning it from the battlefield to your hand.
Resolve the Sarinth Greatwurm trigger, creating a token.
When the token enters the battlefield, Kodama triggers, putting Orzhov Basilica from your hand onto the battlefield.
When Orzhov Basilica enters the battlefield, it and Sarinth Greatwurm trigger.
Repeat from step 4.
This elegant loop relies on Kodama of the East Tree as its engine, turning the cyclic entry of Orzhov Basilica into a self-sustaining cascade. Because Orzhov Basilica automatically bounces itself back to your hand upon entry, it creates a recurring trigger that neatly dovetails with Sarinth Greatwurm's ability to reward every new land with a tapped Powerstone token. Every time that Powerstone token enters the battlefield, Kodama of the East Tree sees a new permanent and triggers to effortlessly slide Orzhov Basilica right back out of your hand, letting you repeat the entire process to generate infinite landfall triggers and an endless horde of tapped Powerstones.