Soon after, Lin Yu arrived at the end of the cave, where there was a stone door. The door was tightly closed, Lin Yu Lin Yu tried to break it open to go in, but he felt that his divine sense could not penetrate it at all!
"How strange! How can this stone door block divine sense detection? There's a strange restriction on this stone door that I can't break, but I can certainly use it to access other caves!"
With a thought, Lin Yu spread his divine sense out of the cave and activated his Heavenly Eye Technique at the same time.
Although Lin Yu had cultivated the Nine Yang Burning Heaven Technique, he had not yet fully mastered it. However, he couldn't worry about that now; he needed to break the restriction first.
Lin Yu's Heavenly Eye Technique swept across the stone door, quickly clearing away the restrictions on it.
"Hmm, something's strange. This restriction seems to be connected to the restrictions inside this cave!" Lin Yu frowned. "Could it be that the reason this cave is called 'Thunder Prison' is because of the restrictions inside this cave?"
As Lin Yu thought to himself, he began to try to break the restriction on the stone door.
Hiss...
The moment Lin Yu's divine sense touched the restriction, the restriction unleashed a powerful surge of lightning.
"What a terrifying restriction!" Lin Yu exclaimed in surprise.
He hadn't expected the restrictions on the stone door to be so powerful, capable of preventing his divine sense from entering the cave.
However, Lin Yu reacted quickly, soon controlling his divine sense to withdraw and simultaneously retracting the intense thunderous pressure.
As soon as the powerful divine pressure withdrew, the lightning runes on the cave returned to their original state, becoming inconspicuous once again.
Seeing this, Lin Yu sighed inwardly, "That was close! Luckily, I reacted in time, otherwise it would have been troublesome. As expected of a celestial-level cave, it even has powerful restrictions. If I were to try to break such powerful restrictions myself, I'm afraid I wouldn't even be able to last half a month."
Lin Yu felt fortunate.
However, after Lin Yu's divine sense wandered around the cave, he did not find any treasures, only a few ordinary medicinal herbs.
"It seems there are only these few medicinal herbs in this cave. If there were anything good, it would probably have been devoured by that lightning tribulation beast long ago."
Lin Yu shook his head and prepared to leave.
"Hey, senior, senior, there's a treasure inside!" Just as Lin Yu was about to leave, Lin Yu suddenly saw a pillar of light shooting into the sky from the cave wall in the distance.
"Huh? There's a treasure?" Lin Yu was shocked. He leaped forward and rushed towards the pillar of light in an instant.
"Whoosh!"
Lin Yu's body swayed, and he instantly passed through the pillar of light.
"Buzz~"
The instant the beam of light pierced through, an extremely dense surge of primordial energy rushed towards us.
"This is..." Lin Yu was greatly surprised.
Lin Yu swept his divine sense and discovered a small lake not far in front of him. In the center of the lake, a huge pill floated. The pill was pure white, with rings of golden light shimmering on its surface. The surface of the pill was covered with all sorts of patterns, densely packed like tadpoles, making the pill appear mysterious and eerie.
This pill, needless to say, is the legendary ninth-grade immortal pill—the Longevity Golden Essence Pill!
Lin Yu was somewhat surprised to find a ninth-grade immortal pill inside this cave.
This kind of elixir is extremely tempting to anyone. Even an ordinary ninth-grade elixir would be fiercely contested by many cultivators, let alone a ninth-grade elixir. Lin Yu is currently only one step away from the Tribulation Transcending Realm. If he obtains the assistance of this Longevity Golden Essence Pill, Lin Yu's strength will definitely increase rapidly, and he may even reach the Immortal Lord Realm!
Although Lin Yu also desperately needed the Longevity Golden Essence Pill, he knew very well that obtaining it would not be easy and would require undergoing a tribulation of lightning.
"This Longevity Golden Essence Pill must have lived for tens of thousands of years. Its spiritual power is extremely strong. Even a powerful expert at the Immortal Emperor level would find it very difficult to refine this Longevity Golden Essence Pill."
With my current strength, if I rashly enter the lightning tribulation, I'm very likely to be struck dead by it!
Lin Yu examined the Longevity Golden Essence Pill with a solemn expression.
The Longevity Golden Elixir is indeed extremely precious, but no matter how precious it is, it cannot compare to one's own life!
For ordinary cultivators, the Longevity Golden Essence Pill might be a rare opportunity, but for someone like Lin Yu who possesses a ninth-grade immortal pill, it's practically useless.
"Since that's the case, then I'll give up on the Longevity Golden Essence Pill for now!" Lin Yu shook his head. "I'll think about it again when my strength has improved."
As soon as Lin Yu Lin Yu finished speaking, he rushed towards the cave entrance, intending to leave.
Lin Yu searched the cave for a while but didn't find anything special, just a few medicinal herbs. However, Lin Yu wasn't disappointed; on the contrary, he was quite pleased. After all, this Thunder Prison Cave wasn't an ordinary cave dwelling, but one left behind by a Celestial Venerable-level expert. It was normal for it to contain some rare medicinal herbs, and more than just one or two.
After leaving the cave, Lin Yu found a flat open space nearby and picked all the medicinal herbs.
During the harvesting process, Lin Yu discovered a medicinal herb, a purple plant.
This purple grass looks no different from ordinary weeds, but Lin Yu knows that this purple grass is definitely not simple.
Lin Yu examined it carefully but found nothing.
"This medicinal herb is definitely much more valuable than the Longevity Golden Essence Pill, but unfortunately, I can't take it yet. I must keep it and study it for a while." Lin Yu shook his head slightly and put the Purple Cloud Flower away.
Lin Yu stayed inside the cave for half a day before finally emerging.
After leaving, Lin Yu did not leave immediately. Instead, he found a secluded spot nearby, sat down cross-legged, and began to comprehend and digest the memories of the lightning tribulation beast.
The Thunder Tribulation Beast wasn't particularly strong, only at the peak of the Dao Integration stage. Lin Yu defeated it with just a few moves. However, what Lin Yu hadn't expected was that this Thunder Tribulation Beast wasn't just a simple demon beast; it also possessed the memories of a human cultivator.
It didn't take Lin Yu long to comprehend the memories of the Thunder Tribulation Beast; he only needed the time it takes to drink a cup of tea to fully understand them.
Lin Yu also understood the origin of the Thunder Tribulation Beast.
Thunder Tribulation Beasts are born from the power of lightning. Although their own strength is not very strong, they are extremely intelligent. They know how to use their innate advantages to find thunder tribulations, absorb the power of thunder tribulations, and strengthen themselves. The stronger they are, the more thunder tribulations they absorb, and the more their strength will increase!