After tidying up a few male students from Gu Feng Academy, Ma Jingtian escorted the frightened Zuo Mingshang and Huang Xuerou back to Qingtian Academy.

Xin Lin, however, was unhurriedly tossing the newly acquired Vessel-locking Technique into the first box of the Opportunity Pawnshop.

In her mind, information regarding the Vessel-locking Technique appeared.

"Xuan-grade Upper-level Technique, Vessel-locking Technique, a unique technique of Gu Feng Academy, divided into three levels: low, medium, and high. The first level locks Qi, sealing True Qi. The second level locks vessels, sealing one or more Spirit Veins of Spirit Warriors below the Xuan Transformation Realm and Great Spirit Masters. The duration of locking Qi and vessels for the first and second levels varies according to the user’s cultivation, with effects ranging from a quarter of an hour to a month. If Qi and vessels are locked thrice, the Spirit Veins will be utterly wasted. The third level locks souls, capable of sealing a person’s Divine Soul for a quarter of an hour, known as the Soul Stabilizing Technique. To this day, no one in Gu Feng Academy has successfully cultivated this technique."

Xin Lin glanced and immediately realized the essence while secretly astonished.

It seemed her diagnosis was not entirely accurate.

This unique technique of Gu Feng Academy can actually be self-unlocked, though the unlocking time is uncertain.

Cheng Kang and others, with their vessels locked, should theoretically unlock by themselves after a while, even without treatment.

However, if the students of Gu Feng Academy were to act maliciously and use it three times in succession, the Spirit Martial Meridians of those Qingtian Academy students would be completely ruined.

Though this technique is only a Xuan-grade technique at Gu Feng Academy, it is still a closely guarded secret. 𝘧𝘳𝘦ℯ𝓌𝘦𝒷𝘯𝑜𝑣𝘦𝓁.𝒸𝘰𝓂

Only a very few gifted students know it.

Originally, Gu Feng Academy did not intend for their students to prematurely expose this technique, but unfortunately, those students couldn’t hold back and used it too soon, relying on the belief that no one could recognize the Vessel-locking Technique, unknowingly discovered by Xin Lin.

The first level of this Vessel-locking Technique is not difficult. After a brief study, Xin Lin quickly mastered the first level, which simply involves using the index and middle fingers alongside the thumb, resembling the act of taking a pulse. As long as the airflow between the Five Meridians is accurately pinpointed, a mere touch can seal the True Qi.

Thereby, Xin Lin didn’t need to spend Heaven-defying Value to begin.

She looked again and saw that advancing the Vessel-locking Technique to the second level would require spending 800 Heaven-defying Value.

Recently, she had accumulated seven to eight hundred Heaven-defying Value, intending to use them later for enhancing the Enchanting Spell.

"The second level of Vessel-locking Technique isn’t difficult. With some practice, I can breakthrough, yet..."

Xin Lin pondered.

The techniques for Vessel-locking are too simple, yet they are special techniques of Gu Feng Academy. Once used publicly, exposure is inevitable.

"If only it could be modified."

Xin Lin thought for a moment and remembered the Dan Wood Furnace she had set aside for quite a while.

The last time, after tossing the unused Royal Garden into it, she gained the Spirit Taming Technique. Maybe she could try again this time.

However, to be safe, Xin Lin cleared her throat.

"Heaven-defying Book, can I use the Dan Wood Furnace to modify the Locking Technique?"

The Heaven-defying Book was silent for a moment.

"The book prompts, system evaluation confirms modification is possible. To modify the Dark-grade top-quality Vessel-locking Technique, it requires spending 200 Heaven-defying Value. After modification, the original learning progress will reset to zero, requiring re-learning of the first level technique."

Upon hearing this, Xin Lin immediately agreed.

Almost without hesitation, she tossed the Vessel-locking Technique, acquired from the students of Gu Feng Academy, into the Dan Wood Furnace.

About a quarter of an hour later, a new cultivation technique emerged from the Dan Wood Furnace.