When thinking a way to get to the Sky Castle, he accidentally saw the Hien by the bottom of the lake and claim that he'll stay by the Hien to start repairing the airship so it can be used to fly to the Sky Castle.
When thinking a way to get to the Sky Castle, he accidentally saw the Hien by the bottom of the lake. He'll stay by the Hien. This was to start repairing the airship so it can be used to fly to the Sky Castle. This is what he claim.