A few days later.

Xu Zhizhi found Lin Jing and brought some good news.

"The cultivation technique has been found!" he exclaimed with joy.

"So soon?" Lin Jing stepped out to greet him. He thought it wouldn't be that easy, after all, a Nascent Soul-level cultivation technique would be a highlight even at some top Immortal City auctions.

"With me on the case, don't worry!" Xu Zhizhi sat by the stone table in front of the cave dwelling, and Lin Jing immediately smiled and offered a pot of tea.

"Why is this tea sweet and cold?" Xu Zhizhi, whose mouth was parched, was taken aback after taking a sip.

"Just tell me if it tastes good."

"It has a unique flavor; it's more like fruit water than tea, delicious!" The scholar savored it.

"It's homemade by my pet beast and me, called iced black tea."

"Alright, talk about the cultivation technique."

Xu Zhizhi wiped his mouth and said:

"Both cultivation techniques have been found, created by the same person. Although both can cultivate to the Nascent Soul, compared to standard Nascent Soul cultivation techniques, their training conditions are rather demanding."

"Are you aware of the 'Ice and Fire Island'?"

Lin Jing shook his head: "Never heard of it, is it a cultivation force?"

"Yes, the reason it's not well-known is that it's already disbanded!" Xu Zhizhi explained, "Thousands of years ago, two Divinity Transformation Demon Emperors fought, one with a flame bloodline, the other with ice bloodline, and their battle stirred formidable power of heaven and earth, transforming an island into an ice and fire landscape."

"That's how the Ice and Fire Island came into being… Later, a group of cultivators practicing fire and ice attribute cultivation techniques arrived at the place, harnessing the rich natural power of ice and fire to cultivate, and over time, they formed a force called 'Ice and Fire Island.'"

"However, as the natural power of Ice and Fire Island gradually dissipated, the force lost its cultivation land and hence its long-lasting legacy."

"In our Dragon Palace, there is someone whose ancestor was a Nascent Soul cultivator of Ice and Fire Island, so he cherished the cultivation techniques of ice and fire attributes! However, since these ice and fire attribute techniques were created based on the specific environment of Ice and Fire Island, cultivation beyond the Golden Core Stage heavily relies on the treasures of extreme heat and cold. Without such a place, the techniques are no better than standard Golden Core-level techniques."

"Since the legacy of Ice and Fire Island is gone, they agreed to exchange these two cultivation techniques for the Dragon Ascending Pill. Although the techniques have limitations, they are willing to offer several auxiliary spells."

"I see, a cultivation technique with environmental limitations…" Lin Jing mused slightly, finding the issue not too significant, believing that by the time the twins reached the Golden Core Stage, several decades would have passed. There's no point in worrying about matters so far ahead now.

As for how to handle reaching the Golden Core Stage, they could seek higher-level techniques or territories with Golden Core-level strength and the Ice Soul Gu Seed; solutions exist for every problem.

Facing potential issues left by this cultivation technique in the future, he trusts in their wisdom to handle it!

"Let's go with this one." Lin Jing nodded. In the short term, apart from Ice and Fire Island's discontinued legacy potentially offering cultivation techniques, legitimate sect disciples are unlikely to have such authority.

He didn't want to waste too much time finding techniques. After all, it's a prime age for the Jiang twins to cultivate; wasting years searching for techniques would be too great a loss.

If needed, they could find better techniques later and have them retrain. Although switching techniques would cost time and effort, with a solid foundation in place, it wouldn't be a major issue.

"And these!" Xu Zhizhi took out a list of Spirit Plants…

...

Inside Hidden Dragon City.

The Jiang twins already found an inn to stay. Compared to the airspace, Lin Jing is considered a well-known cultivator in Hidden Dragon City, from his arrival to making it on the Heaven's Pride ranking, tales of Lin Jing can be heard everywhere.

Knowing Lin Jing's journey of growth, the Jiang twins were even more puzzled because none of these tales involved Blood Path Demon Technique or Gu techniques. This Elder Lin… concealed it deeply.

"Stop overthinking, regardless, it's Elder Lin who saved us. Otherwise, we'd have become a corpse puppet by now."

"Helping Elder Lin raise Gu insects…isn't much trouble, I feel like Elder Lin holds no malice." Jiang Lin looked at her brother and said, "Didn't Grandma teach us to repay kindness with gratitude?"

Jiang Qi nodded, agreeing with his sister's logic, but then suddenly froze.

Bang!

The wooden door was kicked open!

Their hearts raced as they felt a formidable force.

"Demon Extermination Bureau case!!" A lavishly dressed young man eyed the Jiang twins arrogantly: "Two Qi Cultivation Stage little Gu Masters daring to venture into Hidden Dragon City; although your Gu insects are well concealed, unfortunately… you met me, the nemesis of evil."

Gao Sheng held up the Demon-Seeking Compass.

"Surrender now."

The Jiang twins' expressions shifted.

Just then, a crimson leaf floated in through the window.

Both sides paused as they looked at the leaf.

Subsequently, Lin Jing's figure gradually emerged with a ripple of space.

Lin Jing's appearance eased the Jiang twins' apprehension while astonishing Gao Sheng greatly.

"What are you doing here?" Lin Jing looked at Gao Sheng speechlessly.

Gao Sheng held the compass-like magic artifact and said, "Exterminating demons, they..."

This compass could seek out Gu insects, corpse puppets, and undead creatures; refined by the Demon Extermination Bureau, it was a rare demon-seeking artifact, unavailable even to regular Golden Core Stage Demon Exterminators.

"They're with me. The Gu insects within them are mine; you've got the wrong people." Lin Jing was surprised; he confirmed that the Ice Soul Gu Seed was well hidden within the twins, yet Gao Sheng could discover it with this artifact.

"What the heck!!" Gao Sheng was disappointed, thinking he had cracked a big case in Hidden Dragon City.

"But since you're here by chance, have them assist you next."

"Huh?" Gao Sheng was stunned.

As he looked at the Jiang siblings, Lin Jing threw out two jade slips.

"Elder…" The Jiang twins were still bewildered.

"'Divine Fire Transformation' and 'Imperial Extreme Ice Whale Technique,' the former is a fire attribute cultivation technique, and the latter is ice. They were created by the cultivators of the now-extinct Ice and Fire Island, based on battle traces left by two Divinity Transformation Demon Emperors 'Nine-tailed Divine Fire Fox' and 'Ice Whale Emperor' from various ice and fire techniques."

"Cultivating these techniques and harnessing your twin-bodied physique, you can perfectly wield the Gu insects within you."

"Divinity Transformation Demon Emperor!!" The Jiang twins, holding the jade slips containing the cultivation techniques, were astounded.

"Ice and fire techniques…Twin body…Gu insects…so the tasks you issued in the Dragon Palace were for them, I see, they're vessels for the Gu insects…" Though lacking talent for solving cases, Gao Sheng, well-exposed since childhood, quickly surmised Lin Jing's purpose in bringing these twins!

"Jiang Qi, Jiang Lin, this is Gao Sheng from the Demon Extermination Bureau, a prodigy of the Demon Extermination Gao Family. Once you've switched cultivation techniques, join the Bureau and become Brother Gao's teammates or subordinates, assisting him with investigations. With his backing, you can freely employ the power of Gu insects."

"Wait, what?" Gao Sheng was bewildered again.

"I did intend to form my own demon extermination squad, but not with a demon cultivation squad!"

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