Resolve the Kodama trigger, choosing to put nothing onto the battlefield from your hand.
Holding priority, activate the basic Forest by tapping it, adding .
Resolve the Felidar Retreat trigger, creating a 2/2 Cat Beast creature token.
When the Cat Beast enters the battlefield, Kodama triggers.
Holding priority, activate Living Twister's second ability by paying , returning the Forest from the battlefield to your hand.
Resolve the Kodama trigger, putting the Forest onto the battlefield from your hand.
When the Forest enters the battlefield, Felidar Retreat triggers.
Repeat from step 4.
This clever loop centers around Kodama of the East Tree, whose triggered ability creates a cascading chain reaction whenever a permanent enters the battlefield under your control. By replaying a basic Forest returned to your hand via Living Twister's activated ability, you trigger Felidar Retreat to generate a 2/2 Cat Beast creature token. That token's entry immediately satisfies Kodama of the East Tree again, allowing you to seamlessly cycle the land back into play, re-trigger Felidar Retreat's landfall ability, and fuel Living Twister's mana cost with the freshly untapped land.