A day and a night later, Guo Yang and Tiexin arrived at their destination in the flying boat.

On the map, there are thousands of miles of desert Gobi around this place, and there are only oases within a radius of seven or eight miles. But after Guo Yang arrived, he found that the oasis here was basically about to disappear, and there was still green in the place of no more than half a mile, and the surrounding area was full of desert.

However, even in such a small oasis, there is an unexpected spring of clear water.

A bend of the clear spring, ripples lingering, as clear as jade. The spring is in the quicksand, the drought is not exhausted, and the wind blows the sand without falling, which is quite a spectacle.

This spring accumulates water into a lake, is crescent-shaped, about seventy or eighty zhang long from east to west, and about ten zhang wide from north to south.

The rippling blue waters of the lake reflect a breezy and light sky, which is extremely chic.

What particularly surprised Guo Yang and Tie Xin was that the crescent moon spring was surrounded by a sand mountain, eighty miles from east to west, forty miles from north to south, four or five hundred feet high, and pure sand gathered.

This mountain is miraculous, and the peak is like being cut. At first glance, the whole body is golden. However, if you look closely, you will find that the sand here has five colors: red, yellow, green, white, and black.

Guo Yang grabbed a handful of fine sand and was concentrating on probing, when suddenly a roar came from behind him.

Guo Yang was startled and turned around suddenly, but saw Tie Xin happy for a while, and walked down the sand mountain on foot. The roar came from the sand mountain.

Tie Xin was also startled, and hurriedly stepped on the flying sword, nervously looking at the fine sand that was still slowly flowing under his feet.

Guo Yang poked out his divine sense, shrouded the surrounding area of more than 100 zhang, and explored it in detail.

He was surprised to find that the structure of this sand mountain was extremely peculiar, and it seemed to be hollow. Moreover, the sand grains of this sand mountain contain a special mineral, which can explode into a hollow roar at the moment when the sand particles collide with each other.

Guo Yang urged the Five Spirit Boots, and at the fastest speed, he explored the area within a hundred miles of this place, and found no abnormalities, and then returned to the sand mountain near the Crescent Spring.

"Miss Tie, this sand is quite strange, do you want us to investigate?" Guo Yang frowned and said.

Tie Xin was accustomed to seeing Guo Yang's hippie smiling face, and when he saw his rather dignified expression at this moment, he began to feel a little worried in his heart.

"It's a little weird here, so let's change places. Tie Xin said hesitantly.

"It's okay, let's take a look. Guo Yang took out an elixir, opened his mouth and swallowed it, and then urged the power of his divine sense with all his strength to probe into the interior of the sand mountain.

Ten zhang.

Twenty zhang.

Thirty zhang.

......

When Guo Yang's divine sense power probed more than seventy zhang, his face became a little strange.

"What did you find?" Tie Xin couldn't help but feel a little anxious as he watched Guo Yang's expression change.

Guo Yang didn't speak, and continued to probe the power of divine sense.

"Weird!" Guo Yang frowned and muttered to himself.

"What the hell is it?" Tie Xin's divine sense power could only probe forty or fifty zhang below the sand mountain, and seeing that Guo Yang seemed to have discovered something, he became more and more anxious.

"Miss Tie, do you want to go to the underground palace to have a look?" Guo Yang said suddenly.

"Is there a dungeon down there?" Tie Xin asked in surprise with his eyes widening.

"Well, it's not small, at least there are four or five halls. Guo Yang said.

"Is there any danger?" Tie Xin looked at Guo Yang and asked.

"I haven't noticed anything wrong at the moment. It's just that there's a very strange circle down there, and I don't know about it. But it seems that the years have been too long, and the spiritual power has been greatly reduced. Guo Yang said with a deep groan.

Guo Yang stepped on the Five Spirit Boots, stood high in the air, and groaned to lay out hundreds of array flags within a radius of seven or eight miles.

Tie Xin stood in the distance, looking at the magic circle at the mercy of Guo Yang in surprise. She has been following her father, Mr. Iron, since she was a child, and although she has not studied the formation, her knowledge is extremely good.

At this moment, when Guo Yang laid out a set of "Six Ding Liujia Array", Tie Xin was really surprised.

Guo Yang didn't have the heart to care about Tiexin, he pinched his fingers and calculated, and at the same time inserted a pole array flag into the yellow sand.

After arranging the Liuding Liujia Array, he thought for a moment and casually added a few small psychedelic arrays.

At the mercy of the array flag, Guo Yang pinched the trick with his left hand, and hit dozens of strange and mysterious magic seals with his right hand.

With a dull hum, the Great Array opened.

The air within seven or eight miles began to twist and flow at a speed visible to the naked eye. In a few breaths, the original crescent spring and the surrounding dozens of big trees disappeared, all of which turned into an ordinary desert, even if you stood at the original location of the crescent spring, there was a clean yellow sand under your feet.

Looking at the effect of the magic circle, Guo Yang smiled slightly, turned his head to Tie Xin and said, "Miss Tie, please join the formation." ”

After the two of them entered the magic circle, Tie Xin's face changed slightly. She found that this magic circle at the mercy of Guo Yang couldn't help but isolate and have an excellent psychedelic effect, and even naturally formed a cave environment, if it weren't for the extremely powerful divine sense, he would be attacked by a series of illusion arrays, and he would fall into all kinds of illusions and be unable to extricate himself.

Guo Yang took out a large number of digging tools from the storage bag like a trick, threw a big shovel comparable to a top-level magic weapon to Tie Xin, and said lightly: "I'll dig in front, you can just get the excess sand and stones aside." ”

After speaking, Guo Yang injected spiritual power into the big shovel in his hand and began to dig quickly.

Tie Xin took the big shovel depressedly, but he had to frown and clean up the sand and gravel excavated by Guo Yang to the side. This was the first time Tiexin had done such a thing, and she probably never dreamed that one day she would be able to work like a coolie with a big shovel in hand.

Guo Yang dug very quickly, and in less than two hours, he dug out a tunnel dozens of zhang deep and winding all the way down.

As he dug and probed with the power of his divine sense, he soon dug in front of a stone gate.

This stone gate is not very high, less than a zhang in appearance, but it is extremely thick. Guo Yang used his spiritual power with all his might, but he could only push the door to shake slightly, and he couldn't open it at all.

Guo Yang looked at the stone gate, a little worried.

He tried several methods, but he couldn't open the stone door.

"Miss Tie, come and help. Guo Yang turned his head and said.

Tie Xin approached the stone door, groaned slightly, and turned his hand to take out two things from the storage bag. A ashlar, a chariot.

She first placed the ashlar stone in the corridor seven or eight zhang away from the stone gate, and then lowered the chariot close to the stone gate. Then, Tie Xin used his divine sense to probe the stone gate, and nodded slightly, as if he was a little surprised.

"Find a way to glue the chariot to the stone door. Tie Xin said.

Guo Yang was stunned for a moment, not understanding the meaning of Tiexin, but he did not hesitate to play a few magic decisions, and the chariot rose in the air, as if it was absorbed by an invisible huge force, and with a soft "snap", it was attached to the stone door.

Tie Xin lowered his head and calculated for a moment, turned his hand and took out a small golden sword, and after injecting spiritual power, he carved seven or eight quaint patterns on the stone door. These patterns burst with a bang and suddenly burst under the urging of the law decisions that the iron core kept entering.

A soft "click" came from inside the stone door.

Tie Xin casually smashed a magic decision into the square stone seven or eight zhang away, and recited a spell in a low voice, and a palpitating attraction force suddenly came out from the square stone.

However, this attraction is mainly directed at the chariot artifact.

There was a loud "boom", and the stone gate was pulled by the chariot.

The door turned out to be open outward!

Guo Yang was depressed for a while.