Before them stood tall mountain walls, forming a circular enclosure.
It looked like a huge crater formed by a massive meteorite impact—inside it lay the Ice-Fire Two Poles Spring and the immortal herbs.
But Lin Yu knew this was not caused by a meteorite.
Long ago, during a divine battle between beast gods and human gods in the Divine Realm, two powerful divine dragons had died here, causing the crater.
These fallen dragons were two of the nine Dragon Kings under the strongest beast god of the Divine Realm—namely the Ice Dragon King and the Fire Dragon King.
Because the Ice and Fire Dragon Kings had fallen here, the energy emitted from their bodies over countless years eventually formed the Ice-Fire Two Poles Spring and gave rise to these rare top-grade immortal herbs.
"I think what we're looking for is inside here," Lin Yu said.
"Brother, protect Xiao Yu well. I'll charge in first!"
Seeing this, Demon-Slaying Douluo took the lead and easily broke through the various poisonous formations set by Dugu Bo.
Protected by Qian Jun, Lin Yu followed closely and stepped inside.
Finally, he saw the spring with water in both icy blue and fiery red colors.
Beside the Ice-Fire Two Poles Spring were clusters of immortal herbs.
Lin Yu's eyes grew wild with excitement, and he was thrilled: "So many! There are actually this many!"
He saw over a hundred immortal herb plants, with dozens already fully matured!
Although he didn't recognize all of them, he was familiar with most!
In this world, knowledge about rare materials and mystical herbs was quite shallow. Even Dugu Bo, a title-rank expert, who held many top-tier immortal herbs, did not know how to properly use them.
However, some people studied this knowledge deeply.
For example, the Po family's Yang Wudi.
And the Chrysanthemum Douluo, Yue Guan.
Among them, Yue Guan was probably the most knowledgeable about immortal herbs.
Lin Yu had learned that Yue Guan not only knew about the Mystical Heaven Chrysanthemum and the Lovesickness Red Herb but also many more.
At that time, Lin Yu wondered how Yue Guan had obtained such knowledge—could it be from the Wu Hun Hall's library?
After all, the Wu Hun Hall had a history of over ten thousand years and was the richest repository of knowledge on Douluo Continent.
So one day, Lin Yu ascended to the library floor accessible only to elders.
Sure enough, in a dusty corner, he found a book documenting various immortal herbs!
So before coming here, Lin Yu had already made full preparations.
He discovered one immortal herb in the Ice-Fire Two Poles Spring that seemed tailor-made for him.
This herb was called the Seven-Color Purple Golden Flower.
It possessed seven attributes just like his martial soul—fire, water, earth, wind, light, darkness, and space. Though not the most supreme, it was the most suitable for him.
Without hesitation, Lin Yu plucked it and stored it separately in his spatial soul artifact.
The Seven-Color Purple Golden Flower also had the effect of consolidating and enhancing one's base, raising soul power levels.
Since he was already at level 18 soul power, it would be a waste to absorb it now.
He planned to wait until level 20. For now, his main goal was the Octagonal Mysterious Ice Grass and the Fierce Fire Apricot.
These two herbs—one a top-grade fire poison, the other top-grade ice poison—were sure to strengthen Lin Yu's fire and water attributes, and truly grant him immunity to both ice and fire!
Additionally, they would make him immune to all poisons and greatly enhance his physique, effects far stronger than any whale glue!
Undoubtedly, these two herbs were the best for improving physical constitution.
However, because they mainly improved constitution, absorbing them wouldn't significantly increase soul power.
"I've found the resources I want. Now I'm going to absorb them immediately. Please wait here patiently, both of you!"
"No worries!"
With that, Lin Yu unfurled his angel wings and flew above the Ice-Fire Two Poles Spring.
"After absorbing the Octagonal Mysterious Ice Grass and Fierce Fire Apricot, my second soul ring will definitely be at least a level 4000 spirit beast!"
"Let's go!"
"Octagonal Mysterious Ice!"
"Fierce Fire Apricot!"
Lin Yu spread his wings wide as the ice and fire energy swept out, instantly pulling the two herbs before him.
He let them collide with each other, then swallowed them in one gulp!
"Huh? My body can briefly withstand these top-grade ice and fire poisons? Fine, for safety I'll absorb them immediately."
Puff!
Lin Yu plunged into the spring.
After a long time...
Meanwhile, on the other side,
Dugu Bo was quickly heading back to the Ice-Fire Two Poles Spring, accompanied by a girl about thirteen years old.
The girl had short, deep purple hair and looked very spirited. She wasn't exactly stunningly beautiful, but she was a rare kind of beauty with an exotic charm.
This girl was none other than Dugu Bo's granddaughter, Dugu Yan.
"Grandpa, I feel like if I spend a few more days training here, I can break through to level 26!" Dugu Yan said happily.
"Hehe, really? My granddaughter is amazing!" Dugu Bo replied kindly.
The Ice-Fire Two Poles Spring was the best sacred place for Dugu Bo to cultivate poison techniques, and it was equally beneficial for Dugu Yan. So whenever he had time, Dugu Bo would bring her here to train.
What puzzled Dugu Bo was that his granddaughter was a genius with innate level 8 soul power. Plus, she had access to this prime place for poison cultivation.
So why, at 13 years old, had her soul power only reached level 25?
Dugu Bo himself had relied on the Ice-Fire Two Poles Spring to reach the Title Douluo realm, so he knew well how fast cultivation here could be.
With such resources aiding her, shouldn't his granddaughter have broken through to level 30 by now?
Dugu Bo even began to suspect that his granddaughter had been affected by the poisonous backlash of the Biling Snake martial soul, causing her cultivation speed to slow.
"Sigh... I, Dugu Bo, have played with poisons all my life, yet I'm helpless against the poison in my own body, and it may even harm my descendants. Yan Yan, Grandpa is sorry," Dugu Bo sighed deeply.
Soon, the grandfather and granddaughter arrived at the entrance to the Ice-Fire Two Poles Spring.
"Damn! Someone's broken my poison formation!"
Dugu Bo's face instantly darkened, murderous intent flaring: "Who dares trespass into my sacred training ground?"
With fierce momentum, Dugu Bo charged in with his granddaughter following.
At this moment, Qian Jun and Demon-Slaying were sitting cross-legged near the Ice-Fire Two Poles Spring, eyes closed.
Suddenly, they both opened their eyes.
"Hm?"
They had sensed Dugu Bo's arrival.
Yet Qian Jun and Demon-Slaying remained calm, still seated as if the intruder was just some minor nuisance.
To them, Dugu Bo was indeed just a small-time nuisance.
"Brother, that poison expert has arrived."
"Little brother, since he's here, let's just kill him. This Dugu Bo isn't that powerful, but in the soul master world, he is unrivaled in poisons and famous for his group attack skills."
"In the future, if our Wu Hun Hall wants to unify the continent, having Dugu Bo standing with the empire will be a serious problem for us."