The black groove holds something; it's a wooden box.

This wooden box is extremely exquisite, and what's most surprising is that Lin Yifan finds it somewhat familiar, as if he's seen it somewhere before.

"Strange? Where have I seen it?"

Lin Yifan constantly ponders, searching and searching, he suddenly recalls that unforgettable island experience.

Back then, in order to rescue An Qi, he battled with An Gang's people, ending up trapped on the vast sea, even encountering a group of fierce great white sharks along the way. Fortunately, he had a jet ski, but the fuel was running low, and to avoid danger, he had to steer the jet ski to a small island.

This island is an extremely dangerous one, called "Snake Island" by the nearby fishermen.

It was here that Lin Yifan obtained the result of Witchcraft True Master's life's research — "Serpent Spirit Qi."

Additionally, he also acquired Witchcraft True Master's unique secret manual and a box of treasures.

He remembered there was something particularly special in the box, a delicate wooden box.

At that time, the wooden box was placed in the most prominent position, indicating its extreme importance. However, when Lin Yifan opened it to examine, he merely found a black gemstone of unknown origin.

He thought it was Black Ink Jade, but after checking it online, he discovered it wasn't, which truly puzzled him.

Not knowing the value of the black gemstone, Lin Yifan stored it in an inconspicuous corner of the blue Immortal Ring, and over time, he almost forgot such an item existed.

Lin Yifan wasn't sure if the wooden box with the black gemstone was identical to the one in front of him, so he took it out for comparison.

After searching in the blue Immortal Ring for a long time, he finally found the wooden box with the black gemstone, and upon carefully observing the pattern on it, he realized it seemed increasingly similar, as if crafted by the same person.

To verify his hypothesis, he took out Witchcraft True Master's wooden box and compared it with the one under the Black Gold Chair.

When the two boxes were joined together, a complete wood carving pattern emerged before him.

Lin Yifan covered his mouth, shocked and unable to believe that these two boxes from different eras were a pair.

"Treasures from hundreds of thousands of years ago? Oh my! Have I really gathered both items?"

Lin Yifan felt he was incredibly fortunate, so much so that tears began to fall from excitement.

It's known that these two wooden boxes have caused many battles; countless strong individuals from ancient times to the present have lost their lives over them.

With so many strong individuals vying for these two boxes, Lin Yifan believed the treasures inside must be extremely valuable, no less than the Immortal Ring.

If it's not the Immortal Ring, then what could it be?

Lin Yifan couldn't conceive anything since the Immortal Ring was the most valuable thing he knew of; nothing surpassed its value, not even the shortcut secret to becoming an Immortal Realm strong expert.

Witchcraft True Master's box contained the black gemstone, could this box also hold a gemstone?

With this question in mind, he held his breath and slowly opened the wooden box placed in the black groove.

In an instant, a white light shone out, extremely dazzling.

Lin Yifan instinctively used his hand to block the light while closing his eyes.

When the light weakened, he lowered his hand and opened his eyes to observe.

Suddenly, a white gemstone appeared before him.

This white gemstone's shape matched the black gemstone's, and its size was identical; only the color was different.

Holding both gemstones out, and upon joining them together, a Tai Chi appeared before him, entirely seamless.

Lin Yifan finally understood why the black gemstone was in the shape of an animal tooth; it turned out to be the Yin pole of the Tai Chi.

But what use does this Tai Chi have? Joining them together, no strange phenomenon occurred.

Lin Yifan felt it still wasn't complete because both gemstones had a very noticeable "missing edge," that was the extremity, commonly known as the fish eye.

The extremity was a small hole; initially, Lin Yifan thought it was for threading a line, yet now he realized it wasn't so simple.

Joined, the gemstones form a circular jade pendant; Lin Yifan believed this "jade pendant" served some purpose, possibly to activate a mechanism, or perhaps to unlock some kind of Prohibition Formation, or open up the location of a Secret Realm.

No matter its use, there must be a great secret behind this "jade pendant," otherwise, countless strong individuals from ancient times to the present wouldn't have fought and died over it.

"What's its use?"

Lin Yifan attempted to think it through, but ultimately had no results; helplessly, he stored away the two gemstones.

The excitement was in vain, now looking back it seemed laughable. However, indeed it was a treasure, deserving of such joy.

Calming down, Lin Yifan continued to search in the black groove.

When taking out the wooden box, he noticed a trace of something lingering in the black groove, among which was a relatively thick ancient book, of unknown subject.

However, anything stored in such a place must be a priceless treasure.

Thus, filled with curiosity, Lin Yifan took out this ancient book.

Upon opening it, various types and levels of Prohibition Formations appeared before his eyes.

It turned out to be a book concerning arrays.

Upon carefully reviewing it, Lin Yifan found that the types and difficulty levels of the arrays recorded in this Formation Book surpass those known by Qingxu Immortal and Beixuan Immortal.

With this in hand, he felt confident in facing many ancient Prohibition Formations.

On turning to the second-to-last page, he saw an array that seemed quite familiar.

There were numerous notes left, indicating that the Moonlit Sect Leader had put in considerable effort to decipher this high-difficulty array.

Recalling in his mind, Lin Yifan suddenly found himself astonished, his face revealing shock and an incredulous expression.

"How is it possible? How did I find the method to crack it here?"

Lin Yifan was immensely astonished, never expecting to be this lucky, questioning if he really stepped in dog poop today?

Upon entering the Moonlit Sect, he did smell the scent of poop, but it wasn't dog poop; it was Spirit Beast dung.

Could smelling Spirit Beast dung bring so much luck? If so, he considered smelling it every day.

Back to the point, he immediately stored the Formation Book carefully, awaiting its use during his journey to the Desert Dynasty.

Indeed, the second-to-last page held the records of the array set by the desert emperor, which no one had been able to crack.

Back then, the Moonlit Sect Leader joined forces with an external Cultivation Organization to attack the Desert Dynasty; they must have obtained the cracking method for the Prohibition Formation protecting the Desert Dynasty, or they couldn't have entered at all.

This was tremendous news; Lin Yifan no longer needed to fret over cracking the Desert Dynasty's perverse Prohibition Formation.

The Moonlit Sect Leader was truly a "good person," unbelievably so.

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