Clearing His Mind

Lin Mu then brought Jing Luo and King Hong to the middle of the grotto and showed all the ores, the trees, the smaller herbs, and the spring that flowed out from the middle. Its water was tinged light red and looked beautiful as well.

The water was naturally warm and if one drank it, one would feel their insides heat up. To normal humans, just a sip or two would be fine, but if they drank more, they might get a fever and if they still kept it up, they would just end up dying.

This was because there was fire elemental spirit Qi mixed into it. This was in a very delicate balance since the fire element was the opposite of the water and both counteracted each other. 

The existence of the spring was already rather rare. But if one compared the concentration of the fire elemental spirit Qi in the water to the air, they would find that the air was more concentrated.

Thus, the value of the water was lesser than just cultivating directly in the air.