Taking the key from the gatekeeper ninja on the left, Orochimaru came to the door.

When the key was inserted into the keyhole, a slight chakra light suddenly appeared. Around the keyhole, there were twelve different symbols: "Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai", representing the twelve seals.

Orochimaru's eyes moved lightly, which was the "password lock" left during design. In addition to the key, it also required the seal that would change every period of time to open the door.

Orochimaru calculated in a low voice, and a series of formulas flashed rapidly in his mind, his eyes were extremely solemn. After using the key to activate the portal, this special ninjutsu mechanism must be unlocked within ten seconds, otherwise the barrier will be automatically triggered.

Fortunately, Orochimaru was well prepared. Although he could not directly get the seal to untie the mechanism, he roughly learned the algorithm in Naruto's confidential documents.

There is a saying that scientists are mathematicians. In this world, there is naturally no such thing as scientists, but everything is always the same. No one in Orochimaru's mathematical attainments cannot match his entire Konoha.

Based on the years and time, and even the seal calculations I used last time, Orochimaru calculated what he needed in just five seconds and quickly sealed with both hands.

As the hands change, the symbols representing seals illuminate each other, followed by a slight rumble, and the door opened to both sides.

Orochimaru's mouth curled slightly, and a slightly cold smile appeared. He pulled out the key and threw it back to the unconscious Shangnin, strode into the building.

The door behind him closed, the building was very bright, and it had been switched to electricity, and was familiar with the road and headed towards the steps in the distance.

Ninjas have an extraordinary persistence in building underground bases. Even the secret rooms where ninjutsu are stored like to be placed underground. This habit has been continued from the Warring States Period to today.

Orochimaru knew that the underground of this building was divided into three layers, and the higher the level of ninjutsu, the higher the level, which corresponds to the level B, A, S, and three types of ninjutsu. As for the stronger mystery-level ninjutsu, it is impossible to preserve it here.

After entering the first underground floor, Orochimaru glanced at it. This floor was the largest, at least a few hundred square meters. It collected most of Konoha B-level ninjutsu. As long as you can name it, you can basically find it here.

He still remembered that the first time he chose ninjutsu here was after completing the mission in Iwa Ninju Village, the reward of the mission allowed him to choose an S-level ninjutsu, which he exchanged for two A-level ninjutsu and three B-level ninjutsu. On the contrary, Jiraiya and Tsunade both chose an S-level ninjutsu.

There are too many ninjutsu here, and it is almost impossible to copy them all in one night. He himself does not have the special blood-resistance limit like the Sharingan. Even if the memory is quick, he cannot remember it. He quickly selected some ninjutsu memories that he wanted to check in advance and copied some of the most needed ninjutsu at present.

When he walked to the center, he then picked up a scroll with the three big words "Rashomon" written on it.

Orochimaru opened it without hesitation and read it quickly.

"Rashomon" is a unique ninjutsu of the Thousand Hand Clan. It is a powerful high-end ninjutsu. It is powerful and can attack or defend. It uses spiritual skills to summon a huge Yama Portal. At first, only one can be summoned, which is the original B-level ninjutsu.

With the improvement of chakra and control skills, the doors that can be summoned are also competing for. For example, the "Three-Level Rashomen" is already the most powerful one among the A-level ninjutsu. As for the stronger "Five-Level Rashomen", it is undoubtedly the S-level ninjutsu.

But no matter which one, its basis is "Rashomon", and the only difference lies in the strength and control of the interpreter.

According to Orochimaru, this move has appeared at the highest level of "Nine-Level Rashomon". I heard that the legendary first-generation Naruto can be used, and the chakra is an astronomical number is required, so it is not used many times, and its power can even surpass the mystery-level ninjutsu.

Ninjutsu that can be upgraded is naturally a rare variety. Orochimaru quickly remembers the memory and turns to find other ninjutsu. While opening the memory, he uses ninjutsu to expand his seal.

Silently calculating the time, about thirty minutes passed, Orochimaru stopped the movements in his hand. Within such a long time, he recorded a total of forty-seven different B-level ninjutsu, which was considered extremely fast, but compared with all the recorded ninjutsus in this layer, it was undoubtedly a drop in the bucket.

He did not miss it and quickly went to the next level. B-level ninjutsu is the entry to advanced ninjutsu and is the most commonly used ninjutsu by most of the Uenin. Many stronger ninjutsu developed on this basis. If the time is enough, Orochimaru would be happy to write down more.

It’s a pity that the time is limited tonight, so he must leave enough time to record the A-level and S-level ninjutsu later, and also leave enough time to leave.

There are no barriers or traps inside the ninjutsu chamber. After all, being able to come in under such strict protection is enough to show that it is your own person, and there is no need to do anything else inside.

When they went down to the second floor, Orochimaru quickly selected it. This layer was obviously much smaller than the previous floor, even only one-tenth of the size. The recorded ninjutsu was much rarer, and it would be good if there were hundreds of them.

He chose two of the five attributes of ninjutsu, and he continued to go down without hesitation.

In his calculations, he had two hours. The first layer consumed half an hour, but the second layer only consumed ten minutes. The rest of the time he had to record the third layer of S-level ninjutsu. After all, those were the real purpose of this time.

The third floor is very small, the size of a small house, and there are three rows of stone platforms, each row has ten, and there are a scroll of S-level ninjutsu on each stone platform.

Orochimaru's eyes flashed with a feverish look, and he clenched it with one hand. For him, these were rare "truths".

His eyes swept across the room at a glance. Suddenly, he felt something was wrong, as if something had been ignored by him.

He suddenly turned his gaze and saw a figure in the middle of the room, covered in a black robe standing quietly, looking at him with a playful look on his face.

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Chapter completed!