Han Li took a brief look and put away the three immortal artifacts, the black bone saber, the long rectangular inkstone, and the paperweight. Then, he reached out and beckoned.

Above the ground, a treasure-laden box about a foot in size floated up and landed in front of him.

The box was sealed with a mechanism lock on each of its four sides, each affixed with a silver talisman.

After examining them for a moment, Han Li discovered that the four talismans were the "Azure Dragon Imprisoning Wood Talisman," the "White Tiger Melting Gold Talisman," the "Vermilion Bird Raising Fire Talisman," and the "Black Tortoise Rejecting Water Talisman." Whether in terms of grade or quality, they were all top-notch among restriction talismans.

"To think they'd use the Four Symbols Formation to seal this box. What could be hidden inside? To think Feng Tiandu, that old fossil, would treasure it so much?" Han Li wondered aloud to himself.

As he spoke, he began to cast a spell, his body radiating golden light, and started to unravel the Four Symbols Formation.

The reason the Four Symbols Formation is difficult to break is that the powers of the four symbols complement each other, serving as pillars for one another. Therefore, they cannot be broken one after another but must be unraveled simultaneously. Otherwise, it could lead to the direct destruction of the contents within the box.

Therefore, the best way to break it is to have four people of similar cultivation simultaneously exert their power and unravel it together.

Han Li did not do this, however. His approach was simpler and cruder. He directly summoned the Mantra Treasure Wheel to envelop it, and before the four talismans could create a chain reaction, he dispelled them one by one in an instant.

After successfully removing the four talismans, the mechanism locks on the four sides of the treasure-laden box clicked open.

Han Li grabbed the lid of the box with both hands, lifted it, and removed it.

As the lid opened, no radiant light or soaring aura emanated from the box. In fact, not even a trace of spiritual power emanated from it.

He leaned over and saw that inside the box were a yellowish ancient book, a black jade tablet the size of a palm, and neatly arranged around them were rows of black nails.

He first took out the yellowish ancient book. As his palm caressed it, he felt a slippery sensation, as if it were made of some kind of animal skin. There was still a slight residual warmth.

On the cover of the ancient book were four large characters: "Illusionary Star Codex."

Seeing this name, Han Li raised his eyebrows slightly, feeling a sense of familiarity.

After thinking it over and over again, he suddenly realized.

Years ago, when he was looking for time-related cultivation methods through the Rogue Alliance, he had heard someone say that the Fu Ling Sect had a cultivation method that could cultivate the Law of Time, and it was precisely this codex.

Regarding time-related cultivation methods, Han Li had only ever come into contact with the True Mantra Transformation Wheel Sutra, so he had no way to deepen his understanding of the Law of Time by comparing it with other cultivation methods.

The appearance of this Illusionary Star Codex gave him the opportunity to do just that.

A strange light flashed in Han Li's eyes. He suddenly remembered something and quickly made hand seals, summoning the Mantra Treasure Wheel.

The giant eyeball on the Treasure Wheel rotated leisurely, and a golden beam of light shot out from it, hitting the yellowish ancient book.

The surface of the ancient book flickered slightly with golden light, then faded away, and there was no more movement.

Seeing this, a look of disappointment flashed across Han Li's face. He then put away the spell and retrieved the Mantra Treasure Wheel into his body, muttering to himself:

"It seems that this thing is different from the stone tablet in the Candle Dragon Path. Although they are both objects that record time-related cultivation methods, they do not possess the power of the Law of Time..."

With his powerful divine sense, it only took him the time it takes to eat a meal to read through this Illusionary Star Codex.

As a result, Han Li was pleasantly surprised to find that although this cultivation method also contained explanations about the power of the Law of Time and ways to comprehend it, the cultivation method and the descriptions were vastly different from the True Mantra Transformation Wheel Sutra. In particular, it mentioned the "Illusionary Star Sand Realm," which seemed to be able to affect the power of time in a certain area after it was cultivated.

However, it seemed that both Feng Tiandu and Qi Yunxiao had very limited cultivation in this method. At least, they couldn't use it against enemies in combat.

Although Han Li couldn't wait to immerse himself in this cultivation method and carefully ponder it, doing so would require a retreat lasting hundreds or even thousands of years, which was definitely not advisable in the current situation.

He forcibly suppressed the thought in his mind and put away the Illusionary Star Codex, intending to explore it thoroughly later.

After taking a deep breath, Han Li picked up the black token and examined it.

The token was extremely smooth, with a transparent luster on the outer layer, but as black as ink inside. It looked like a pool of ink frozen in ice crystals, not yet solidified, with strands of ink still flowing uncertainly.

Slightly raised on the surface of the token were the four characters "Qian Tian Fu Ling." It was unclear whether they had another meaning or represented Feng Tiandu's status as the Great Elder.

Having learned from the previous example of Gongshu Jiu's token, Han Li set up a layer of formations around him before transferring immortal spiritual power into the token, trying to see if he could activate it.

As a result, no matter how he tried, the black token remained motionless, as if it were a dead object.

After several attempts, he couldn't get any results, so Han Li had to give up.

In addition to these two items, there were only some black iron nails left in the treasure-laden box. There were quite a few of them. After counting them, there were a total of eighty-one.

Han Li casually took out one and examined it closely. He found that the iron nail, which was only about the length of a finger, was densely covered with various patterns. There were strange beasts and many peculiar runes. It was clear that it was not an ordinary object.

Around the iron nail, there seemed to be wisps of ink-like black mist lingering, making it extremely mysterious.

After Han Li took out all the iron nails, he suddenly noticed that there seemed to be a black iron plate embedded in the bottom of the treasure-laden box. On it were crisscrossing grooves of varying depths.

After taking out the iron plate, he discovered that it was covered with spiritual patterns. It was actually a formation disc of considerable grade. In the lower left corner, there was also a series of raised characters that read: "Qian Tian Fu Ling, Formation Guards Eight Directions."

"This... could it be a mountain-guarding formation?" Han Li held the formation disc in one hand and the token in the other, muttering to himself after looking at the eighty-one black iron nails on the ground.

Thinking this, he flipped the formation disc over and found a recessed groove on the back, the outline and size of which were exactly the same as the black token in his hand.

With a thought in his mind, he placed the token into the groove.

With a soft "click," the token fit perfectly into place. Suddenly, black light flowed on it, and the black ink inside flew out like swimming dragons, patrolling the surface of the formation disc.

Wherever the ink dragons passed on the formation disc, dark golden light spots lit up at the intersections of the crisscrossing lines.

Seeing this, a look of joy flashed in Han Li's eyes. He quickly refined the formation disc and the token together.

Then, he placed it on the ground, connecting it to the entire mountain of the small island. Then, he picked up a black iron nail and placed it on a dark golden light spot on the formation disc.

As soon as the iron nail came into contact with the formation disc, it was immediately subjected to a powerful force of attraction. It suddenly broke free from Han Li's hand and, with a "铮" sound, was nailed into the dark golden light spot.

Almost at the same time, a loud rumbling sound came from the dense forest not far from the eastern part of the small island.

When Han Li looked up, he saw a black light pillar more than hundreds of feet high rising from the ground, pointing straight into the sky.

It seemed to have strange beasts entrenched on it, and a faint black aura was constantly flowing out of the surface.

"As expected..." Han Li was overjoyed and continued to pick up iron nails and place them on the formation disc.

As the sounds of "铮" kept ringing, black iron nails fell into the formation disc one after another, and black light pillars rose from the small island out of thin air.

After the last black light pillar also rose into the sky, the black mist surrounding the light pillars suddenly spread out, merging with each other, and soon turned into a layer of light black light curtain, covering the entire small island.

Then, the black light pillars that appeared in various places on the small island began to fade, gradually becoming transparent, until they disappeared into the void.

Before long, the light curtain covering the island also disappeared, as if nothing had happened.

However, on the formation disc in front of Han Li, there was already a small island protected by a formation.

After watching for a while, he stood up, flashed, and flew out of the island.

When crossing the light curtain, Han Li could clearly feel a feeling of being scanned by spiritual power fluctuations, but because he had already refined the formation, he was naturally not affected in any way.

Looking at the island from the outside, the entire small island had not changed in the slightest. There was no way to see that there was a formation covering it, and there was no spiritual power fluctuation. However, when Han Li used his Bright Clarity Spirit Eyes to investigate, the island-protecting formation was undoubtedly revealed.

He flew a thousand feet away from the island in one breath, raised one hand and clenched his fist, mobilized the immortal spiritual power in his body, and punched the small island.

Only a loud "boom" was heard!

The entire void stirred for a while, and a huge fist shadow with a size of a hundred feet was born out of thin air, squeezing the heaven and earth vitality, layer upon layer like a sea wave, and crushed towards the tricolor island.

As soon as the two came into contact, the formation barrier, which was originally invisible to the naked eye, suddenly appeared.

Black light shone brightly on it, and ink dragons constantly rose from the eighty-one black light pillars, gathering towards the place where the fist shadow was crushed, running the power of the formation, and resisting.

The sky above the small island suddenly roared constantly. A depression tens of feet deep was pressed into the black light curtain, and it seemed to be in danger, but there was still no sign of collapse.

Seeing this, Han Li couldn't help but nod secretly.

Although he did not use his full strength in this punch, it was activated by the mid-stage Golden Immortal cultivation base, and its power was indeed not small. If it was an ordinary True Immortal-level sect's mountain-protecting formation, I am afraid that even the roots of the formation disc would have collapsed.

According to Han Li's estimation, the defense limit of this Qian Tian Fu Ling formation should be slightly inferior to the formation deployed by the Northern Cold Immortal Palace in the Candle Dragon Path when dealing with Baili Yan.

However, even so, this treasure is enough to be impressive.

It is important to know that ordinary sect-protecting formations need to select mountain roots with abundant spiritual energy in various parts of the sect as the foundation of the formation, and arrange specially refined formation flags and formation pillars to suppress the formation, so as to ensure the power of the established formation.

However, although this kind of formation has great power, it is a dead formation. It cannot be moved or changed. It is not easy to be broken by people from the outside, but it is easy to be attacked by people from the inside, destroying the formation base and the formation hub.

This Qian Tian Fu Ling formation is activated only with the formation disc, but it is a living formation. It can be put away and taken away at any time, which is not only very convenient, but also not easily damaged.

After some exploration, Han Li even faintly felt that this thing should be a simplified version of the Fu Ling Sect's true mountain-protecting formation, and he was naturally quite delighted.

In the future, if he opens up a cave in another place, with this treasure in hand, he can naturally save a lot of trouble.