Kodama of the East Tree | Cloudstone Curio

Cards

An additional nonartifact permanent card in your hand that you are able to play.
An additional nonartifact permanent card on the battlefield that shares a type with the card in your hand and that has an equal or lesser mana cost.

Cast
Kodama of the East Tree by paying ({4} magic symbol) ({G} magic symbol) ({G} magic symbol) .
When
Kodama of the East Tree enters the battlefield,
Cadric and
Cloudstone Curio trigger.
Resolve the
Cloudstone Curio trigger, declining to use it.
Resolve the
Cadric trigger, paying ({1} magic symbol) to create a token copy of
Kodama of the East Tree.
Play the nonartifact permanent in your hand.
When it enters the battlefield,
Cloudstone Curio and both copies of
Kodama of the East Tree trigger.
Resolve the
Cloudstone Curio trigger, returning the other nonartifact permanent from the battlefield to your hand.
Resolve the first
Kodama of the East Tree trigger, putting the permanent you returned in step 7 from your hand onto the battlefield.
When that permanent enters the battlefield,
Cloudstone Curio and the second
Kodama of the East Tree trigger.
Resolve the
Cloudstone Curio trigger, returning the permanent you played in step 5 from the battlefield to your hand.
Resolve the
Kodama of the East Tree trigger from step 9, declining to use it unless desired.
Resolve the remaining
Kodama of the East Tree trigger from step 6, putting the permanent you returned in step 10 from your hand onto the battlefield.
Repeat from step 6 any number of times.
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 combo has been estimated to be Exhibition (Bracket 1+).