The rune heart seal appeared and faintly between Mei Lin's eyebrows. Then, mysterious runes suddenly flew out from the rune heart seal, quickly forming a complex magic array, pressing downward towards the rune magic array in the distance.

"Click".

The complex rune magic array was instantly broken by the rune heart seal, revealing a deep valley inside.

In the deep valley, there was a deep cave entrance. Meilin looked at it casually and found that the cave entrance seemed to have been discovered. It was thought that it was discovered by the Mir family accidentally.

There must be some secret in the entrance of the cave, otherwise the Mir family would not have hidden the entrance of the cave so seriously with a rune array.

"Swoosh".

Merlin walked directly inside without any hesitation.

The passage was very dark and a little wet. Merlin stretched out his fingers and a light white flame appeared on his fingertips, illuminating the passage.

As he went deeper into the passage, the more violent the two books of the vast books in Meilin's hand fluctuated. There is no doubt that the third volume of the vast books must be deep in the passage.

Therefore, Merlin became more cautious. If the Book of Great Han is in the passage, why did the Mill family not take the Book of Great Han away?

And if it is the third volume of the Book of Greatness, it records a large number of Pandora magical powers. Why did the three level seven masters of the Mill family not practice Pandora magical powers?

Everything in this kind of thing is a bit mysterious.

As Merlin penetrated, a light finally appeared in front of him, which was the light of the candlelight. Is there still people from the Mill family inside now?

Merlin's mental power was also paying attention to everything around him at any time. As he walked out of the passage, he came to an underground secret room. Candles were lit on the walls around him to illuminate the secret room, but no spell caster was seen.

In the secret room, there are also some signs of spellcaster activity. It seems that the Mill family does send people here often, but what is the secret here that deserves so much attention from the Mill family?

There is only one entrance in the secret room, which is a huge stone door. The mechanism is very simple, right next to the stone door. When Mei Lin opened the stone door, he saw an amazing scene.

A terrifying destructive aura instantly filled the entire room. Even Meilin seemed to be suffocating at this moment, and did not dare to take another step forward.

Meilin looked at a huge rune magic array in front of him. It was like a transparent crystal, with a force as thick as a pillar, emitting a violent aura.

"The law, and it's the terrifying law of thunder!"

Meilin was really familiar with the laws. This aura fluctuation was exactly the law he had always dreamed of coming to Tongtian Peak to find. And from the analysis of its aura fluctuation, it was obviously a thunder law.

Currently, Meilin has the fire-type law and the ice-type law, but there is a thunder law hidden in Tongtian Peak. Due to the violent thunder law, ordinary spell casters can even get it, not to mention getting close to it.

Especially the rune magic array that wraps around the law of thunder is even more complex and contains terrifying power. Once the rune magic array is slightly touched, it will be devastatingly hit by the rune magic array.

At this time, Merlin finally understood why the Mill family attached so much importance to Tongtian Peak, and even more so why the Mill family sent people to the secret room.

They have discovered the law hidden in Tongtian Peak!

This Thunder Law should be left by the mysterious master of the Book of Greatness. Moreover, the third volume of the Greatness Book is around the Law of Thunder. It is not that the people of the Mir family do not want to get the third volume of the Book of Greatness, but that they cannot get it at all.

Because they were unable to get close to the Thunder Law at all, and were afraid of the attack of the rune magic array, the Mill family specially built such a secret room to protect the Thunder Law, and at the same time they were also trying to get close to the Thunder Law or get the third volume of the Book of Extinction.

But unfortunately, the laws left by the great legend and the rune arrays arranged by themselves are not necessarily able to break these rune arrays, not to mention the Mill family, which only has three weakest seventh-level casters, even those spellcasters with level nine-level casters may not be able to break these rune arrays.

You should know that this rune magic array is extraordinary. It is not a pure defensive magic array, but a rune magic array with defense and attack. Once the rune magic array is touched, it will be immediately attacked by the rune magic array.

If the rune magic array arranged by the legendary wizard himself attacks with all his strength, who can guarantee that he can withstand it?

The Mill family discovered this thunder law and the third volume of the vast book, but they were powerless to do anything about the laws and the vast book, so they could only watch it with greed, but could not get it.

This is also the sorrow of the weak spell caster! There is only one treasure mountain but cannot be used.

"Buzz".

Meilin took a deep breath, mobilized the rune heart seal, and the rune heart seal with a faint light flashed, showing every structure of the rune magic array arranged by the legendary wizard in front of Meilin.

But even so, after seeing the structure of the rune magic array clearly, Meilin took a breath. The arrangement of this rune magic array was too complicated.

It is the most complex rune magic array that Merlin has encountered so far, except for the entire magic array in the Dark Spirit Realm. The rune magic array in the Dark Spirit Realm was arranged by Master Fidel. I don’t know how much effort it took to arrange it.

Master Fidel has almost reached the pinnacle of his achievements in rune literature, otherwise it would not have been possible to condense such a magical treasure as the Rune Heart Seal.

With the Rune Heart Seal, Merlin was able to go from knowing nothing about rune literature to now being able to arrange and crack some profound and complex Script formations, all relying on the power of Rune Heart Seal.

The same is true for the rune magic array in front of you. Although it is too complicated, it does not mean that it cannot be cracked, it just takes a long time.

Meilin doesn't believe that there is a rune heart seal. There are still rune methods that cannot be solved. However, Meilin also has one worry. If the rune array is unlocked and the thunder law bursts out, how can that terrifying power be resisted?

Merlin suppressed the law of ice last time, and relied on the matrix derivation spell, quickly consuming the law of ice, and then the law of flame could suppress the law of ice.

However, now Merlin's dark eye must be suppressed by the power of law, and in this way, the power of law will be consumed almost every moment, and Merlin must have a large number of laws.

This thunder law is very huge. Merlin doesn't want to use up the only one, so that the fourth form of the Dark Eye can't be suppressed.

"Swish".

Meilin took out the first and second volumes of the Book of Greatness. Now these two books of the Book of Greatness have changed drastically, and they can't even help but fly out of Meilin's hands.

Meilin pondered for a while, then let it go. See what changes will happen after these three volumes of vast books are combined.

"Swoosh".

Meilin did not suppress these two books of vastness, but instead allowed these two books of vastness to fly out.

The two volumes of vast books quickly flew outside the rune magic array, and then it seemed that they were blocked by the rune magic array and could not fly in. In the rune magic array, the third volume of vast books next to the Thunder Law also clearly sensed the two volumes of vast books, which actually emitted a rich light and flew quickly towards the two volumes of vast books.

This third volume of the vast book is very different from the first two volumes of the vast book, exuding a mysterious and powerful aura, just like a powerful spellcaster.

The rune magic circle did not stop the third volume of the vast book, but it was directly passed through the rune magic circle. It quickly entangled with Meilin's two volumes of the vast book.

In the air of the secret room, in the dazzling light, three volumes of vast books slowly merged. As mentioned in the Great Book, only when the Three Volume Books were combined can the law be found.

Then, after these three volumes of vast books are integrated, they should have a close connection with this thunder law, and Meilin also has some vague expectations.

Time passed little by little. After about an hour, finally, the light on the three volumes of the vast books gradually dissipated, and the vast books appeared again in the air.

However, at this time, the vast book had completely changed, leaving only one vast book. This vast book emitted a golden light, and mysterious runes appeared faintly on it.

"Buzzing"

The runes on the vast book were entangled with this extremely complex rune magic array. Then, the complex rune magic array began to gradually dissipate.

This surprised Meilin. It turned out that after these three volumes of vast books were combined, they had such a function. He didn't need to use the power of the rune heart seal to break the complex rune magic array.

As the rune array disintegrated, the violent aura of the Thunder Law echoed unscrupulously throughout the secret room. Even Meilin seemed to be in a surging wave, looking quite small and helpless.

Meilin reluctantly supported it, then gritted her teeth and grabbed the Great Book of the Sky in the air. The moment she grabbed the Great Book of the Sky, Meilin felt that the terrifying violent aura of the Thunder Law seemed to have been absorbed by the Great Book of the Sky, and Meilin would not be affected at all.

Moreover, there is a strange power in the vast book, connected to the law of Thunder, allowing Merlin to easily approach the law of Thunder.

"Holding three volumes of vast books can absorb the laws of thunder!"

On the cover of the Book of Wide, small golden characters suddenly flashed, all written in ancient Morta texts, which should be left by the mysterious legendary wizard.

"It turns out that to absorb the laws, the vast book must rely on the vast book!"

Merlin felt his eyes lit up. Now he knew how important these three books of vast books were? Otherwise, even if he found the law of Thunder alone, he would be helpless in the law of Thunder and rune formations like the people of the Mill family.

This thunder law is different from the law of ice. It is a special way to absorb it for people. As long as you hold three volumes of vast books, you can easily absorb this law.

Mei Lin took a deep breath, calmed down his excitement slightly, and held the golden book tightly in his hand, and began to slowly approach the thunder law that exuded a violent aura.
Chapter completed!