Wei Cheng also nodded and said: "According to the records, our ancestors have searched the entire valley very carefully, and according to observation, the concentration of this fog is very balanced throughout the range, if there is a source of fog dispersion, then it must be dense near the source, and it is relatively thin in the distance." ”

Fang Ling frowned when he heard this, yes, three hundred years have passed, and the people at the bottom of the valley must have carefully inspected and searched for the possible source of poison, and it is impossible for such a big mistake to occur.

But if it has nothing to do with fog, what is it?

His eyes suddenly lit up, and he remembered something: "Where did the detoxification grass be found?"

"Lost Cliff. Zhao Meng replied.

"Cliff Fall? Sounds sinister. Fang Ling said.

Zhao Meng said: "It is a very hidden place, from the time of a pillar of incense here, there is only a very hidden path to pass through, after passing through, it is a cliff, there is only a small place below, the detoxification grass is found on the side of the cliff, there are only a few plants at that time, and then after careful cultivation, each tribe has a place to cultivate." ”

Fang Ling was curious: "Under the cliff, has anyone been there?"

Wei Cheng replied: "You can go down there, but after going down, the place is not big, and there is a pool in the middle." The water in the pool was unusually cold, and some guards dived down, but because it was too cold to dive, because it had nothing to do with the fog, and it was not our water source, so I didn't check it again. ”

Fang Ling stood up and said, "You can take me to the Lost Cliff for a walk." ”

"This ......" Zhao Meng and the others couldn't help but be stunned for a moment, and hesitated, "Childe, the place is remote, it's a place where the three don't care, although the antidote grass is gone, but in case you meet an enemy there, ......"

Wei Cheng said: "If the prince must go, then the emperor should send someone to ......."

Fang Ling waved his hand and said: "There is no need to inform the emperor of this matter, so as not to worry him, we just go for a trip, and then come back, in case we encounter an enemy, I have my own way to deal with it." ”

"This ......" The two looked at each other and nodded.

So, under the guidance of the two, Fang Ling went out of the imperial city, all the way north, passing through the deep jungle, so silent that there was no sound, compared to the forest full of life in the outside world, under the valley bottom, in addition to plants, there were only human beings.

It didn't take long for them to finally arrive safely at the Lost Foot Cliff, which was really as the two said, between a gap in the mountain wall, the road was narrow and difficult to walk, and it was covered by trees, inconspicuous, who would have thought that there was a world behind it?

Standing on the cliff, you can see the ice pool below, and the white mist rising from the pool can feel a chill when you stand on it.

The three of them walked slowly down the cliff by the cliff, and when they fell to the edge of the pool at a depth of 100 meters, Zhao Meng and the others couldn't help but shudder, Fang Ling's cultivation had reached the realm of rigidity, and his ability to resist the cold was much higher than the two of them, but they could also feel the obvious chill.

The water in this pond is actually not large, only a few zhang long, because the temperature here is very low all year round, and the surrounding mountains and rocks are covered with a thin layer of ice, and there are no weeds.