Kodama of the East Tree + Rakdos Carnarium + Zendikar's Roil

Kodama of the East Tree

Rakdos Carnarium

Zendikar's Roil

How it works

1. Play Rakdos Carnarium.
2. When Rakdos Carnarium enters the battlefield, it, Zendikar's Roil, and Kodama of the East Tree trigger.
3. Resolve the Kodama of the East Tree trigger, choosing not to put anything from your hand onto the battlefield.
4. Resolve the Rakdos Carnarium trigger, returning it from the battlefield to your hand.
5. Resolve the Zendikar's Roil trigger, creating a token.
6. When the token enters the battlefield, Kodama triggers, putting Rakdos Carnarium from your hand onto the battlefield.
7. When Rakdos Carnarium enters the battlefield, it and Zendikar's Roil trigger.
8. Repeat from step 4.

This clever loop turns the self-bouncing nature of Rakdos Carnarium into an engine by using Zendikar's Roil to churn out Elemental tokens whenever a land enters. Each time a token arrives, Kodama of the East Tree's triggered ability steps in to drop that returned bounce-land right back onto the battlefield from your hand without spending any mana. By perpetually cycling the land and creating new tokens to trigger the whole sequence anew, you generate an endless cascade of permanents, landfall triggers, and creature tokens.