Compared to other immortal herbs, the Star Luo Holy Pearl had a particularly unique effect.
According to the Immortal Herb Compendium, consuming the fruit of the Star Luo Holy Pearl could not only enhance a Spirit Master's cultivation, but also transform into a Soul Power storage core within their body, granting them vastly superior reserves of Soul Power compared to others of the same rank.
In the current Douluo Continent, the concept of Soul Cores had not yet emerged within the Spirit Master world.
Thus, in the compendium, the description of the Star Luo Holy Pearl's effect could only go so far.
However, as a transmigrator, Ye Yu clearly understood that the true function of the Star Luo Holy Pearl's fruit was to fuse with a Spirit Master and eventually form a Soul Core!
In fact, Ye Yu had always known about the Star Luo Holy Pearl.
Just like how he knew about the fierce spirit beasts hidden beneath the Star Dou Forest's core region, the Snow Empress, Ice Empress, and Ice Devil Titan King of the Extreme North, and so on.
But these pieces of knowledge were from the internet, and based only on having read or watched Douluo Dalu 1.
As such, Ye Yu didn't fully understand many of the later-introduced herbs and characters, including the Star Luo Holy Pearl.
He didn't even know what the Star Luo Holy Pearl looked like.
He only knew that its fruit could become a Soul Core.
Otherwise, he might have eaten it during his first trip to the Ice and Fire Yin Yang Well, and directly turned it into his Soul Core.
Still, this turned out to be a blessing in disguise.
After all, compared to the first Soul Core, forming the second Soul Core was even more difficult.
Now, after consuming the fruit of the Star Luo Holy Pearl, Ye Yu could choose to place it in one of the lower dantian acupoints—not just the traditional Qi Sea Acupoint, but also one of the three others: Guanyuan, Yinjiao, or Shimen.
Then, using the first set of Demon Willow Fluff meridians, he would cultivate XMysterious Heaven Skill, and treat the chosen acupoint as the corresponding lower dantian, turning the Star Luo fruit into a true Soul Core for his second path of cultivation.
Standing before the Star Luo Holy Pearl, Ye Yu released his Soul Power and drew down the fruit, swallowing it whole.
Afterward, he sat cross-legged beside the Ice and Fire Yin Yang Well, and began cultivating using the Inner Core Technique.
As soon as the fruit entered his stomach, Ye Yu instantly felt a massive surge of medicinal energy released into his body, merging ceaselessly into his Soul Power.
Yet, even after all its medicinal essence had been discharged, the Star Luo Holy Pearl's fruit didn't vanish.
Instead, it gradually shrank in size until it became a golden sphere, about the size of a longan fruit, which could store Soul Power inside it.
Ye Yu discovered he could control this golden sphere freely.
Eventually, he placed this golden orb—this embryonic second Soul Core—into the Guanyuan Acupoint, one of the four potential lower dantian spots.
He then infused the Mysterious Heaven Skill inner energy stored in his first Demon Willow Fluff meridian set into the second Soul Core.
After refining all the medicinal energy from the Star Luo Holy Pearl, Ye Yu estimated that his cultivation had increased by at least one rank.
After swallowing the Star Luo Holy Pearl, Ye Yu used the Blue Silver Space's teleportation to instantly return to the Dugu Mansion.
"Grandfather!"
Back at the mansion, Ye Yu found Dugu Bo with a smile.
"What is it, Xiao Yu?" asked Dugu Bo, who was still experimenting with new medicinal formulas.
Since being inspired by Ye Yu—especially in developing a body-enhancement elixir using whale glue—Dugu Bo had thrown himself into potion research.
At the moment, he was testing how to use Dragon Ganoderma leaves to develop a healing tonic that could restore injuries and Soul Power.
Ye Yu didn't waste time. Smiling, he retrieved a jade box from his Jade Dragon Bracelet.
Opening the lid revealed a peculiar spiritual herb—its whole body was jade-green, with long stalks and leaves, and a dragon-head-shaped blossom at the top.
"I didn't mention this earlier, Grandfather," Ye Yu said. "When I went to Spirit City for the Continental Advanced Spirit Master Academy Elite Tournament, I not only subdued Chrysanthemum Douluo and Ghost Douluo, but also acquired a book from Chrysanthemum Douluo's belongings."
"As you know, his Martial Soul, Chrysanthemum, is an immortal herb."
"So I suspected his family might have a deep understanding of such herbs—and I was right. They'd compiled a tome detailing many rare and immortal plants."
"I call it the Immortal Herb Compendium."
"One of the herbs recorded in it was this: Dragon Blood Grass."
"This plant only grows where true dragons or high-level dragon-type soul beasts have perished."
"To non-dragon soul beasts, it's simply an exceptional herb that improves constitution."
"But for dragon-type Martial Souls or dragon-type soul beasts, consuming Dragon Blood Grass can trigger Martial Soul evolution."
Ye Yu explained with a grin.
Dugu Bo trembled with excitement. "A herb that can evolve dragon-type Martial Souls… Our Jade Phosphor Serpent Martial Soul is a dragon-type!"
"Could this Dragon Blood Grass really cause our Martial Soul to evolve?"
"If the Compendium is accurate, then yes—it should enable your Jade Phosphor Serpent Martial Soul to evolve," Ye Yu replied with a calm smile.
Initially, Dugu Bo reached out, about to ingest the Dragon Blood Grass himself.
But then he suddenly thought of his granddaughter, Dugu Yan.
With a sigh, he withdrew his hand. "No, no... Xiao Yu. I'm already old."
"Even if my Martial Soul evolves, there's only so far I can go."
"You should give this herb to Yan Yan. That way its full potential won't go to waste."
Ye Yu was touched by the sentiment, but still smiled. "Grandfather, there's no need to decline."
"Didn't I tell you? There aren't just one, but six stalks of Dragon Blood Grass around the Ice and Fire Yin Yang Well!"
"There's enough for both you and Yan Yan."
As an extraordinary herb, it would be normal for only one Dragon Blood Grass to grow in a location.
But to find six around the Ice and Fire Yin Yang Well?
This made Ye Yu more certain than ever:
Deep beneath the Ice and Fire Yin Yang Well…
Lies the corpse of the Ice-Fire Dragon King.
Only the fall of such a being could give birth to six stalks of Dragon Blood Grass at once!
Ye Yu felt an overwhelming urge to dive into the depths of the Ice and Fire Yin Yang Well to investigate.
Unfortunately, despite having consumed both the Octagonal Mysterious Ice Grass and Infernal Delicate Apricot, which had given him immunity to extreme ice and fire, diving 10,000 meters into the Earth to reach the source was still not something he could guarantee.
If the Ice and Fire Yin Yang Well had indeed formed from the corpse of the Ice-Fire Dragon King, then what flowed at the surface was just ordinary extreme elemental springwater.
But the deeper one went, the more terrifyingly potent it would become.
Diving directly to the source?
That was no different than courting death.