Swaggered around those monsters set up a formation, this formation is called the real fire array, with seventy-two fire-gathering talismans to set up the array, then only need Su Hang's samadhi real fire as a guide, the array can be turned into a sea of fire, these monsters have nowhere to escape.

Because no monster stepped forward to obstruct it, the formation was quickly laid out, and Su Hang withdrew from the formation, waiting for the effect of the ban on martial arts to disappear.

Soon, there was a stirring in the space, and an invisible ripple retracted like a tide, and the light of the forbidden martial arts order hanging in mid-air converged, and quickly flew back to Su Hang's hand.

When the time came, Su Hang felt that at that moment, the power and mana had returned to his body, and he immediately put the ban on martial arts into the storage ring.

Now is the time.

With all his strength, a fireball burst out of his palm, and threw it directly into the real fire array, which was like being filled with gasoline, and the flames rose to the sky in an instant, drowning the monsters that were still inexplicable.

"Roar, roar, roar......"

There was a painful and angry roar in the sea of fire, and Su Hang hurriedly retreated, so as not to be injured by the fire.

A tiger monster and a basilisk rushed out of the sea of fire, covered in flames, roaring in pain, and rushed towards Su Hang, however, before they could rush far, they couldn't bear the burning of the flames anymore, and fell to the ground and tossed.

Samadhi true fire, that is not ordinary fire, not only has harm to ghosts, but also has a strong damage to ordinary creatures.

"Ahem......"

The monster was submerged in the sea of fire, but the smoke choked Su Hang, so he quickly hid far away, and secretly miscalculated in his heart, the flame burns and needs to consume oxygen, and this underground palace is a closed space. How much oxygen can there be, such a big fire. Won't you run out of oxygen soon?

The key is that the smoke is still choking.

Fortunately, Su Hang has already been in the innate realm. Turning to a fetal state, you can not breathe for a long time, just wait for the fire to extinguish, pass through this ninth layer, and you must be able to get out.

After twenty minutes or so, the roar in the sea of fire gradually faded away, and the flames in the True Fire Array were quickly extinguished, leaving behind a scorched earth.

The monsters were burned to the point that only their corpses remained, turning into bits of starlight. Recovered by the runes at the top of the dungeon.

The dungeon was full of scorching smells, the smoke and dust in the air could not be dispersed for a long time, and Su Hang did not dare to breathe, so that his body was as calm as possible and reduced oxygen consumption.

The ninth layer, this is considered passed, right?

Su Hang's heart was full of expectations, there are nine floors in this underground palace, and now the nine floors have passed, if Zhang Daoling had any treasures hidden in this underground palace back then. Then, the treasure should be your own.

In Su Hang's expectation, a yellow light spilled from the top of the cave, and something fell in front of Su Hang.

Su Hang immediately leaned over and picked it up.

It was a small box. It is the size of a children's school bag, the underside is square, and the lid is semi-round. The gold is carved with many exquisite patterns, and anyone who sees it is a treasure chest.

There is a lock hanging from the chest. Su Hang looked for it but didn't have the key, so he tore it hard. failed to tear it open, the material of this box is definitely not an ordinary goods, and the contents are even more difficult.

What is the reason for giving a box but not a key?

Is it possible to find the key yourself?

What is urine?

This is already the ninth floor, where can I find the key? Is it possible to break through again?

Obviously, it is not possible to break through again, Su Hang does not have that mind, let alone that ability, this battle just now is already dangerous and dangerous, it can be said to be a clever victory, if you do it again, whether you can win or not, but it is not necessarily.

took out the Zichen Sword and slashed it directly with a sword.

To open the treasure chest, you don't have to have a key, sometimes, it's better to be simple and rude, the sword light crossed, only to hear a choking sound, the electric light was shining, and the golden lock hanging on the treasure chest was directly cut off by Qi Gen.

The corners of Su Hang's mouth crossed a slight arc, what if there is no key, it was not opened by me.

What's in the box?

Su Hang was a little excited in his heart, could this be the treasure that Zhang Daoling hid in the underground palace?

The tip of the sword was inserted into the gap between the lid and the body of the box, and with a slight flick, the lid was immediately lifted.

In my imagination, it should be golden and blind.

Su Hang was ready to cover his eyes, but when the lid opened, Su Hang was surprised.

In the box, there is only a four-legged four-eared small tripod, half a foot high, black lacquer, the tripod body is engraved with oracle bone inscriptions, the four ears are carved with a green dragon and white tiger Vermilion Bird basalt stone elephant, and the top is sealed by a small tripod cover.

"This must be a medicine pod, right?"

Su Hang lifted the lid of the tripod, only smelled a strong smell of medicine, as if it had been aged for a long time, and it was refreshed, there is no doubt that this is a medicine tripod, and it is also a commonly used medicine tripod.

Otherwise, the medicinal smell inside would definitely not be so strong.

Pull out the system and scan it, sure enough, the guess is good, this small tripod is called Tianshi Ding, which has reached the level of a medium-grade immortal treasure, and it is the medicine tripod of the alchemy of the Heavenly Master Zhang Daoling, the ancestor of the Heavenly Master, legend has it that Zhang Daoling refined the Dragon and Tiger Jindan on Longhu Mountain, and the alchemy tripod is afraid that it is the one in front of me.

Zhang Daoling actually left the Heavenly Master Ding, it seems that Zhang Daoling at that time, either the deadline is approaching to explain the future, or the strength is so strong that he can't look down on this level of medium-grade immortal treasure at all.

Otherwise, who would want to lose all the treasures they have in their hands?

In Su Hang's opinion, I am afraid that the latter may be more, and if this underground palace can be built, Zhang Daoling's strength is by no means idle, I am afraid that it has already surpassed the Jindan realm at that time.

It is another immortal treasure, although he doesn't know anything about alchemy, but no matter what, this thing is already the highest-grade treasure that Su Hang has ever seen, and there will be opportunities to learn alchemy in the future.

Put away the Heavenly Master Ding, and the destroyed box was also put away, the material of the box is special, maybe something can be refined in the future.

The air in the dungeon was terrifyingly dirty, and the smoke could not be dispersed for a long time, Su Hang saw that the teleportation array had been opened, so he stood up without hesitation, no matter what, leave the dungeon first.

The aqua blue halo enveloped Su Hang, and in an instant, it disappeared from the ninth layer.

――

"Hmm, where is this?"

When Su Hang opened his eyes, what he saw was not a landscape, let alone a pot of old faces, but a cave.

It's just that this cave is much smaller than the ninth layer.

On a high platform in the middle, Su Hang at this time was standing on top of the high platform, stepping on the teleportation array under his feet.

"Damn, you won't fight back, will you?"

Su Hang instantly felt like a dog, isn't it a ninth-layer underground palace?

According to the urine nature of this dungeon, the tenth layer, is there not a group of monsters in the Jindan realm waiting?

I can't afford to play now, Su Hang just wants to withdraw quickly, not to mention a group of Jindan, even if there are one or two Jindan realm monsters, there is enough for him to choke.

It's just that Su Hang found that there seemed to be no movement on this floor at this time.

After waiting for a while, he didn't see any monsters coming out, Su Hang was stunned for a moment, could it be that there is no danger in this layer?

Only after passing the ninth layer will you be transported to this place?

With a little apprehension, Su Hang stepped down from the high platform, and sure enough, no monsters came out again.

Carefully looking around, this space is small, smaller than the first floor, and it doesn't look like a monster.

The size of a basketball court, surrounded by tall bookshelves full of bamboo slips.

Su Hang walked towards a bookshelf, more than two thousand years, the bamboo slips on the bookshelf are a little old, but they are still strong, and there is no sign of corrosion by the years.

Carefully remove the roll and gently unfold it.

"Seriously!"

It is full of ancient characters of Juanxiu, which is the scripture of the Heavenly Master Dao "Zhengyi Sutra", and the above descriptions are the cultivation methods and Taoism of the Heavenly Master Dao.

There are not many words that can be recorded in a roll of bamboo slips, Su Hang probably took a look, this entire bookshelf, there are more than ten layers up and down, at least hundreds of volumes, it is a complete set of "Zhengyijing"

"This scripture, I'm afraid that the collection of books in Shidao today is not so complete, right?" Su Hang was happy to see that there was such a place under the ninth floor of the underground palace.

Putting the bamboo slips back on the bookshelf, Su Hang walked to a bookshelf next to him and took down a roll of bamboo slips from the bookshelf.

"Lao Tzu wants to bet!"

It is another volume of Taoism, this Lao Tzu wants to note, the legend is written by the heavenly master Zhang Daoling, it is the annotated version of Lao Tzu's "Tao Te Ching", and the current Chinese Xuanmen is also circulating, but I don't know how much gap there is with this bookshelf.

This underground palace was left by Zhang Daoling, and this volume of scriptures must be the original, and its value is by no means comparable to the version circulated in Xuanmen in Huaxia today.

Lao Tzu wants to note, which also occupies the entire bookshelf, with a total of hundreds of bamboo slips up and down.

Look to the side, "The Yellow Emperor Nine Ding Dan Sutra"

"Huh?"

Su Hang's eyes lit up, and legend has it that Zhang Daoling first retired to the North Mountain to cultivate, and then obtained the Yellow Emperor's Nine Ding Dan Sutra, cultivated in Fanyang Mountain, and became an immortal.

The Yellow Emperor Jiuding Dan Sutra, also known as the Yellow Emperor Divine Pill Sutra, the legend is that the Nine Heavens Xuannu gave Xuanyuan the Yellow Emperor's magic pill technique, the Yellow Emperor combined the divine pill and ascended to the immortal, this scripture is the alchemy that exists in the legend.

There are a total of twenty volumes of this scripture, and Su Hang counted it, these twenty volumes of alchemy scriptures really occupy twenty bookshelves.

"The Secret Book of the Three Emperors", "The Taixuan Sutra", "The Mighty Sutra of the Zhengyi League", "The Edict of the Immortals", "The Southern Dipper Sutra", "The Beidou Sutra", "The Taiping Cave Extreme Sutra", ......

Su Hang's breathing became a little short, this place is simply a hidden place!

Even, in addition to Taoist classics, there are also many classic classics such as Confucianism, Moism, and martial arts, and this is completely a library, a library that has been preserved intact more than 2,000 years ago.

Any classic may benefit an ordinary person for life, not to mention that there are so many books hidden here.

Standing in place for a long time, there is no doubt that this is what Zhang Daoling really left.

After coming back to his senses, Su Hang immediately began to act, sweeping the bamboo slips, along with the rows of bookshelves, and putting them all into the storage ring. (To be continued.) )