The system is the proficiency panel

The atmosphere in the hall was like frozen ice. Xiao Ningxue's gaze swept over everyone present. The formation masters who were originally whispering lowered their heads, not daring to look her in the face.

She knew that Tianshu City had been too dazzling during this period. This floating city, the only one on Kaiyang Star, had not moved since it was moved above the Rift City.

Responsible for many matters, such as the transportation of goods, the repair of Silver Thunder mechas, the maintenance of formations... and Tianshu City itself has the destructive power comparable to that of a Jindan Zhenren, and also made great efforts in defending the Rift City.

But the secret of the Heavenly Dao fragment is the bottom line of her and Lin Ji, and it is also the core of the Xuantian Empire. Any covetous behavior will be regarded as a provocation.

The Tianyan Sect's array master's face was pale, with beads of sweat oozing from his forehead. He swallowed and spoke again with a trembling voice.

"City Lord Xiao, I...I was just confused for a moment, and I didn't mean to offend you!"

As soon as he finished speaking, a beam of light shot out from the formation, scratching his face and leaving a bloody mark, and then the beam dissipated into nothingness. The speed was so fast that even the foundation-building cultivators present could not see it clearly.

Xiao Ningxue's fingers tapped the table lightly, making a crisp sound, and each tap seemed to hit everyone's heart. She stood up slowly, her white hair falling like snow, making her skin look like jade, but revealing an inviolable coldness.

"There won't be a next time. The secret of Tianshu City is the inheritance of several generations of array masters in the East Continent."

Her voice was calm, yet carried an unquestionable authority.

After Xiao Ningxue finished speaking, the light of the formation in the hall gradually dimmed, but the sense of oppression had not dissipated. The formation master nodded repeatedly as if he had been pardoned, retreated to the back of the crowd, and dared not say another word.

Yu Yue sat aside, a trace of relief flashed in her eyes. She looked at her apprentice. Xiao Ningxue was no longer the young girl she was back then, but a strong person who could stand on her own. She coughed lightly and broke the silence.

"Ningxue, regarding the transformation of chaotic spiritual energy, can we try to use blood marrow crystal as a medium? Its energy properties are between order and chaos, and perhaps it can serve as a bridge."

Xiao Ningxue's gaze softened a little, and the coldness in her eyes faded away when she looked at her master.

"Master's suggestion is very valuable. Blood Marrow Crystal is indeed special, but its production is limited, and monks need it more. We need to find a more universal method."

She raised her hand and drew a small formation in the air. The blue runes flowed, forming a simulated picture of the flow of spiritual power. Everyone was attracted by her actions and came closer to observe.

"This is the prototype of the purification array that I recently researched."

Xiao Ningxue explained.

"It can gradually decompose the chaotic spiritual power of the abyss and transform it into orderly spiritual power that can be absorbed by monks. Although the efficiency is not high, it is more stable."

A formation master from Wuji Palace couldn't help but admire.

"City Lord Xiao's attainments are indeed unfathomable! If this can be achieved, the defense of Rift City will no longer be a problem."

Xiao Ningxue nodded slightly, but did not relax because of the praise.

"This is just a preliminary idea, and it still needs a lot of experimental verification. Next, I need your help to perfect the details."

Everyone agreed in unison, and the previous tense atmosphere was finally replaced by discussion. However, Xiao Ningxue was not completely relaxed. She knew that the secrets of Tianshu City would sooner or later attract more people to spy on her, so she had to be careful.

……

Five hours later, the discussion finally came to an end. Under the leadership of Xiao Ningxue, everyone proposed several feasible preliminary plans: one is to use blood marrow crystals as a medium to construct a transition array, the second is to develop a new type of purification rune array, and the third is to try to process the abyss spiritual power in different levels. Although they all need further verification, they finally have a clear direction.

"That's it for today."

Xiao Ningxue looked around at everyone and spoke in a cold voice.

"We will continue at 7:00 pm tomorrow. Each group will begin the experiment according to their assigned tasks."

After everyone left, Xiao Ningxue and Yu Yue walked side by side on the way back to the room.

"Ningxue, your idea for the transition formation is very creative."

There was admiration in Yu Yue's voice.

"But the consumption of blood marrow crystals may be very high."

Xiao Ningxue nodded slightly.

"Yes, Master. So I plan to use a small-scale experiment to verify the effect first. If it is feasible, I will apply to the True Lord for more blood marrow crystal quotas."

She frowned slightly and continued.

"I am more worried about the corrosive nature of the abyss spiritual power. Even after purification, long-term contact may still affect the monks' minds."

Yu Yue sighed softly.

"This is indeed a difficult problem. Perhaps we can design a protective device to filter out the remaining chaotic energy."

The two walked and talked, and unknowingly came to Xiao Ningxue's room. At this moment, Xiao Ningxue suddenly stopped, and a strange light flashed in her eyes.

"Master, I suddenly remembered that I have some personal matters to deal with."

Her voice remained calm, but her fingertips trembled unconsciously.

"We will discuss the formation in detail tomorrow."

Yu Yue immediately knew the reason and smiled knowingly. After all, the only person who could make his apprentice's mood suddenly fluctuate was Lin Ji.

"Go ahead, don't keep someone waiting too long."

Xiao Ningxue's ears turned red, she bowed to her master, and then quickened her pace towards the room. She could clearly feel the most familiar aura in the room - Lin Ji.

Xiao Ningxue pushed the door open gently, moving cautiously, fearing to disturb something. In the room, Lin Ji was sitting cross-legged on the bed, surrounded by a faint red light, which was the energy fluctuation of the blood marrow crystal. Several pieces of blood marrow crystal were suspended in front of him, slowly releasing pure energy.

Xiao Ningxue's eyes softened, and she tiptoed to a chair beside her and sat down, quietly watching her husband in cultivation. The light shone through the window lattice, casting mottled light and shadows on Lin Ji's handsome face. His eyelashes left a slender shadow on his face, and his breathing was steady and deep.

'It seems that he has been practicing for a long time.'

Xiao Ningxue thought, her eyes sweeping over the few pieces of spirit stone residue on the ground that had turned into powder. She did not make a sound to interrupt, but began to deduce the formation plan discussed today in her mind, her fingers unconsciously outlining the rune trajectory on her knees.

Time passed quietly. Two hours later, the red light around Lin Ji gradually faded. He slowly opened his eyes, and there seemed to be stars flowing in his deep pupils. Seeing Xiao Ningxue sitting beside him, he raised a gentle smile.

"Awaited."

Lin Ji said softly, stood up, walked to his wife, and patted her shoulder gently.

Xiao Ningxue came back to her senses from her thoughts, raised her eyes to meet Lin Ji's gaze, and shook her head slightly.

"soon."

Her voice was soft, but it was filled with undisguised joy.

Lin Ji sat down beside her and held her hand naturally.

"This is my first time using Blood Marrow Crystal to practice, and the effect is really good."

He felt the spiritual energy filling his body.

"One practice saved me several months of effort, and I also made new progress in my understanding of artistic conception."

A hint of relief flashed across Xiao Ningxue's eyes.

"That's good. Although the blood marrow crystal is precious, it is worth using it on my husband."

She paused and asked.

"Any news from Elvis?"