In the depths of the Shura Demon Sea, in the center of the original site of the Magic Mirror City, a huge undersea palace has been opened. Nearly 100 monks kept going back and forth between the sea and the bottom of the sea, and a large number of spirit stones exuding a strong aura were sent to the bottom of the sea piece by piece.

In the center of the underwater palace, a strip of nearly 10 meters in diameter is surrounded by 108 stone monuments several meters high erected nearby. The stele is arranged according to certain rules, and there are countless fine lines on each fast top to pierce the concave round holes, and the lines flow with a faint sky blue light, as if the streamlines of the human body's meridians, delicate and complex.

The stele was engraved with intricate talismans, with a rich aura overflowing, and these 108 steles formed a huge aura array.

At the back of the circle, Tu Wei was sitting on the Taishi chair, staring at the erected stone tablets with a cold expression, his torch-like eyes were full of anxious emotions, as if he was waiting for something?

A moment later, a figure appeared beside Tu Wei out of thin air, it was his personal attendant, one of the two protectors with the strength of the late Yuan Infant, the old man Zhu Yan.

"Childe. Zhu Yan's face was a little haggard, showing that he had worked hard for the seventh-level sound transmission array these days, and even saved the time to rest and meditate.

Seeing Zhu Yan returning, Tu Wei was slightly overjoyed, and hurriedly asked, "Elder Zhu, how is the seventh-level transmission note set up? How long does it take to communicate with my father?"

Zhu Yan replied cautiously: "Hui Gongzi, good news, there was originally a fifth-level sound transmission array here, but it was already dilapidated, and after the joint efforts of the old servant and the Meng family brothers, most of the magic array has been repaired." Although the distance of the fifth-level sound transmission array is short, it can also transmit 80 billion miles away. The Dragon Hidden Star is about 150 billion miles away from here, and through the fifth-level sound transmission array, we can save most of the time, according to the old servant's estimate, within twenty years, the seventh-level sound transmission array will definitely be completed. ”

"Really?" Tu Wei stood up from his seat in surprise: "It took fifty years to build a seventh-level sound transmission array from scratch, and you saved most of the time for my son, Zhu Yan, you have contributed a lot." ”

When Zhu Yan heard this, a touch of joy appeared on the old face subconsciously, and he immediately kowtowed: "Do things for the son, the old servant does not dare to slack off." ”

"Good. Tu Wei nodded approvingly.

Then. Zhu Yan said worriedly: "However, Childe, I am afraid that there will be signs of spiritual energy collapse when repairing the sound transmission array, although this spiritual energy is not huge, it may not be able to prevent the appearance of glow in the outer immortal realm, I am afraid that it will attract the prying eyes of people with intentions?"

The sound transmission array is a communication array commonly used by the major cultivation planets of the Immortal Domain, which can be divided up to ten levels by level, and is activated by the best spirit crystal, and the higher the formation cultivation, the higher the level of the sound transmission array built by the person who cultivates the formation, and the range of sound transmission is also extremely wide. It is precisely because of this that there are people who are proficient in formations in the major immortal sects of the Immortal Domain. For example, Zhu Yan, although his realm is only in the late Yuan Infant stage, his strength is not very strong. But for the comprehension of the formation, Zhu Yan is definitely the person who can make Tu Wei respect.

Zhu Yan's worries were unreasonable, and Tu Wei was not confused, so he nodded and said: "There are indeed a few yellow-level stars near the Immortal Spirit Continent, and there are countless demon cultivators, demon cultivators, Buddha cultivators, and ghost cultivators, but whether they will notice that there is a small slave star here is not necessarily." For the sake of immortal weapons, even if it is a master who attracts foreign immortals, he must give it a try. That's why I asked you to build a seventh-level sound transmission array right away. This son wants to inform the door of this matter, and I believe that my father will send a master to come. ”