Ling Zhenfei had long noticed the devouring nature of this spiritual energy, which was why this black spiritual energy had been swirling around Watanabe Kazushi's Dantian.

Although Watanabe Kazushi had very little spiritual energy left in his body, some energy occasionally appeared near his Dantian, but it was immediately consumed by the black qi upon appearance.

As time passed, the black spiritual energy seemed to be locked in a fixed route, continuously rotating near the Dantian.

But this time, it was different. Feeling Ling Zhenfei's spiritual energy, it relentlessly pursued him from behind.

Because Ling Zhenfei's mind was focused on this spiritual energy, it appeared as if a monster was furiously chasing him.

Ling Zhenfei desperately sprinted along the path he had scouted beforehand.

The spiritual energy charged wildly behind Ling Zhenfei, giving a sense of constantly hitting a wall.

The distorted meridians originally in Watanabe Kazushi's body received a massive impact from the black qi, instantly changing direction.

The pain from the altered meridians is unbearable for most, and even though Watanabe Kazushi was a spiritual cultivator, he found this intense agony deeply distressing.

Struck by the black qi, he couldn't help but let out a painful scream; such pain was unfathomable for anyone to endure.

Due to the relentless pursuit of the black qi, Watanabe Kazushi's screams were incessant, the feeling utterly heart-wrenching.

Inside, Ling Zhenfei heard it clearly, but he knew it was necessary. Pain accompanies healing, and there was no better method.

His only worry was whether Watanabe Kazushi could endure it, while fearing the outsiders wouldn't be able to bear it either. If someone suddenly rushed in to sabotage, all prior efforts would be wasted.

However, Ling Zhenfei had specifically instructed earlier, and Watanabe Nagayumi had assured him there would be no interference, but who could really know in such circumstances?

Ling Zhenfei used his spiritual energy to attract the Black Dragon, progressing continuously amid Watanabe Kazushi's screams, moving from the Dantian towards his legs.

Originally, it was an easy path, but the blocked meridians made it difficult to navigate.

The black qi halted near the knee, as if bound by something, and turned back towards its original path.

Ling Zhenfei was startled, uncertain of the cause. Could it be that this spiritual energy truly has a simple consciousness? Otherwise, why would it stop halfway after being attracted?

Thinking it over, Ling Zhenfei reasoned the spiritual energy probably hadn't encountered any advantage yet.

This time, Ling Zhenfei again used his spiritual energy to attract it, and due to its proximity, the black dragon charged towards Ling Zhenfei's direction.

Ling Zhenfei felt glad, as the black spiritual energy's ability to be attracted indicated it still lacked consciousness.

He continued to lure the black spiritual energy towards his legs, using more spiritual energy than before to provide a stronger attraction.

When reaching the knee, Ling Zhenfei deliberately scattered some spiritual energy fragments for the black qi to consume.

Perhaps due to consuming Ling Zhenfei's energy, the black spiritual energy indeed became very active and excited. Ling Zhenfei realized this was best because it would make the black energy charge forth.

Guiding the spiritual energy forward, Watanabe Kazushi screamed heart-wrenchingly again, louder this time due to the excited black energy.

It seemed Watanabe Kazushi truly suffered from the black energy's torment. Despite the extreme pain, he continued to endure rather than asking Ling Zhenfei to stop.

Sometimes a doctor must harden their heart, otherwise how could one endure such matters?

As Ling Zhenfei moved, he let the spiritual energy absorb some of his own, keeping the black spiritual energy active and excited, finally drawing it down to the foot.

Ling Zhenfei readied himself for the final decisive moment. The black spiritual energy, now extremely excited, rushed towards Ling Zhenfei's energy upon seeing it.

Ling Zhenfei made no other preparations, frantically avoiding the powerful spiritual energy's pursuit around Watanabe Kazushi's foot, accelerating with the speed of his spiritual energy.

The meridians vary in size, and the foot contains a Yongquan Acupoint, a major bodily acupoint where various small meridians converge.

Ling Zhenfei led the spiritual energy near Watanabe Kazushi's Yongquan Acupoint, giving the spiritual energy the impression his energy was about to be fully absorbed.

Under Ling Zhenfei's spiritual energy attraction, the spiritual energy rotated faster and faster, reaching an alarming speed.

Ling Zhenfei knew his opportunity had arrived; the early stages were nearly complete, and it was the endgame that mattered.

While his Divine Sense continued to attract the spiritual energy, in reality, Ling Zhenfei had drawn out the Dragon Tooth Dagger.

The Dragon Tooth Dagger was aimed precisely at Watanabe Kazushi's Yongquan Acupoint. At this moment, Ling Zhenfei's spiritual energy and the black energy within Watanabe Kazushi were both at their highest speeds.

Seizing the opportunity, Ling Zhenfei stabbed the dagger into Watanabe Kazushi's Yongquan Acupoint.

Watanabe Kazushi let out a horrendous scream, so intense it resembled murder.

As blood gushed forth, the Dragon Tooth Dagger pierced through the black spiritual energy.

The Dragon Tooth Dagger had a significant attribute of absorbing spiritual energy.

If the energy was strong and concentrated together, the Dragon Tooth Dagger wouldn't be able to absorb it. However, circumstances were different now.

Seizing the opportunity, Ling Zhenfei used the Dragon Tooth Dagger to pierce the black qi, directly scattering the gathered spiritual energy.

The scattered spiritual energy was instantly absorbed by the Dragon Tooth Dagger. Some energy flowed out with Watanabe Kazushi's blood, but the spiritual energy inside him was considered resolved.

Bam!

At this moment, Watanabe Kazushi burst through the door, startling everyone as Watanabe Nagayumi could no longer withstand his screams.

Once inside, Watanabe Nagayumi saw Ling Zhenfei with the dagger, blood everywhere, and Watanabe Kazushi still screaming, the scene resembling a murder site.

"Ling Zhenfei, what have you done!" Watanabe Nagayumi shouted, rushing over.

"What's all the fuss about? Just bandage the wound," Ling Zhenfei said coldly.

Watanabe Nagayumi was taken aback: "What? You say the treatment is complete?"

Ling Zhenfei nodded: "It's done." He spoke as he treated Watanabe Kazushi's wound, an easy task for Ling Zhenfei.

"Mr. Watanabe, the treatment is almost finished. Have you brought what I asked for?"

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