There are four rooms in Sky Castle - each belongs to one of the Pawatuns. But Pawatuns' priestess doesn't have the keys! Her masters do. They must have snuck out of the castle and decided to sleep in their temples instead. Try the Temple of Northern Pawatun first.
In order to get to the Temple of Northern Pawatun, Diggy must place a stone below the statue where the night meets the day.
To find the temple, please pass the bridge.
Go inside the temple and find the first Pawatun.
Only the power of fire can break past the ice standing in your way.
Then, in order to proceed, please pull all four levers.
To get the fire stones, please place the following colored stones represented "turtle" and "butterfly" in the proper place.
Place the fire stones on the proper place:
The last step is to move pieces of draggable on the proper place:
You found the Pawatun of the Northern winds! Only, he's merged with this divine tree. I doubt freeing him from it will be easy. I hope that Diggy's pickaxe is strong enough to get him out.
Talk to Pawatun: