Kodama of the East Tree + Cloudstone Curio + Spark Double

Kodama of the East Tree

Cloudstone Curio

Spark Double

How it works

1. Play the nonartifact permanent in your hand.
2. When it enters the battlefield, Cloudstone Curio and both copies of Kodama of the East Tree trigger.
3. Resolve the Cloudstone Curio trigger, returning the other nonartifact permanent from the battlefield to your hand.
4. Resolve the first Kodama of the East Tree trigger, putting the permanent you returned in step 3 from your hand onto the battlefield.
5. When that permanent enters the battlefield, Cloudstone Curio and the second Kodama of the East Tree trigger.
6. Resolve the Cloudstone Curio trigger, returning the permanent you played in step 1 from the battlefield to your hand.
7. Resolve the Kodama of the East Tree trigger from step 5, declining to use it unless desired.
8. Resolve the remaining Kodama of the East Tree trigger from step 2, putting the permanent you returned in step 6 from your hand onto the battlefield.
9. Repeat from step 2 any number of times.
10. This combo results in Infinite ETB and Infinite LTB if a permanent involved is a creature, and/or Infinite landfall triggers if it is a land.

This ingenious loop turns any two nonartifact permanents into an endless dance across the battlefield by leveraging a clever pair of triggers. When you cast a nonartifact permanent, Cloudstone Curio bounces your other matching permanent back to your hand, which in turn feeds the triggered ability of Kodama of the East Tree to instantly drop it right back down. Because Spark Double provides that crucial second non-legendary copy of Kodama of the East Tree, you get a duplicate trigger to juggle the bounce and cheat everything back into play seamlessly. This creates an infinite cycle of entries and leaves that can flood the board with landfall triggers, creature enter-the-battlefield effects, and free permanents from your hand.