After lunch, Kai felt his energy return, and his body felt refreshed more than usual. Then he found out from Ao that all ingredients of the meal he ate earlier were grown in the Castle's garden, in a place with abundant Nature power.
Rena had told him that plants that were grown in a place filled with Nature power tended to have a good effect on the body. Such as the tea in Spirit Foxes' temple that calmed his mind.
That helped him recover the stamina he lost when training with Panlong.
Sitting on a bench at the Castle's garden, he was waiting for Qianlong to fetch him to the next training area. He still didn't know which room was in the Dragon King Castle. So he was instructed to wait instead of searching the room by himself and got lost in the process.
Thanks to that, he found something interesting.
"We are underwater. How?"