Hundred Thousand Year Soul Bone!

Gazing at the waterfall cascading down from a height of two hundred meters, Gu Yi once again used the Breath-Tracking Qi-Locking Art.

Gu Yi released a drop of blood from his fingertip. It flowed upstream through the water, turning into a faint bloody mist that spread outward.

Before long, Gu Yi sensed traces of pure life energy at a certain spot behind the waterfall.

Moreover, he could not sense Tang Hao's presence, which meant Tang Hao had already followed Tang San to Suotuo City.

"It's there!" The Purple Cloud Wings behind Gu Yi's back flapped, and he shot straight toward the middle of the waterfall.

Following the life energy he had sensed, Gu Yi felt around the rocks behind the waterfall for a while and quickly found the mechanism.

He pressed down with his palm, and a rock that appeared perfectly seamless immediately sank inward, revealing an entrance.

Gu Yi took out a Moonlight Stone and walked inside. Before long, he reached the deepest part of the cave.

This was a stone chamber of only around ten square meters. At the top of the cave wall was a hole that supplied the essence of the sun and moon to a slender Blue Silver Grass growing atop a small mound of soil, its blades marked with fine golden veins.

This was Ah Yin, Tang Hao's wife, Tang San's mother, and a Hundred-Thousand-Year Soul Beast Blue Silver Emperor!

The life energy Gu Yi had sensed outside had come from Ah Yin.

Ah Yin seemed to sense Gu Yi's arrival. Her slender leaves swayed constantly, expressing her unease.

Looking at Ah Yin, Gu Yi pondered, "A Blue Silver Emperor Soul Beast counts as a special Heavenly Material, Earthly Treasure. It should be usable as an alchemical ingredient..."

On the Nine Heavens Continent and Dou Qi Continent, it was extremely difficult for plants to cultivate into demon beasts or magical beasts. More often, they existed as all kinds of Heavenly Materials, Earthly Treasures.

On Douluo Continent, however, there were quite a few plant-type soul beasts, many varieties of which were aggressive.

But precisely because of that, the Soul Power inside plant soul beasts was highly mixed and volatile, making it more difficult to refine them into medicinal pills.

Yet the Blue Silver Emperor before him was different. Its Soul Power was pure life force, making it an excellent choice for refining healing pills.

Gu Yi examined the Blue Silver Emperor's condition and felt somewhat regretful. "This Blue Silver Emperor has only been rebuilding for twelve years, and it has been growing in this sunless cave all along. The Soul Power in its body is limited. If used for alchemy now, it could at most produce a first-grade pill."

"If this Blue Silver Emperor were a Hundred-Thousand-Year Soul Beast at its peak, it could probably be used to refine sixth- or seventh-grade pills..."

After some thought, Gu Yi decided to first transplant the Blue Silver Emperor into the medicinal garden of the Cloud Sea Sect and consider alchemy after nurturing it for a time.

Besides, this would also earn Gu Yi a sum of source power.

After all, if he took the Blue Silver Emperor to the Nine Heavens Continent, Tang San would no longer have it in the future. That was no small change.

Of course, if he wanted the Blue Silver Emperor to grow back into a Hundred-Thousand-Year Soul Beast in a short time, Gu Yi would still need to visit the treasured land known as the Ice and Fire Yin Yang Well.

Gu Yi passed the swaying Blue Silver Emperor and walked to the stone wall behind it, striking out with his right palm.

With a ding, a pitch-black object fell from above and landed precisely in Gu Yi's hand.

It was a long black box, extremely heavy in his hand, weighing more than two hundred jin. Yet to Gu Yi, who had already reached the ninth level of the Qi Martial Realm, it was as light as a feather.

Gu Yi opened the box, and a gentle, vibrant aura washed over him.

Inside was a blue-gold right leg bone, crystal clear throughout, with what looked like specks of starlight flickering within it. It emitted dense fluctuations of life-attribute Soul Power, leaving Gu Yi feeling utterly refreshed.

The Hundred-Thousand-Year Blue Silver Emperor Right Leg Bone!

Sensing that familiar life fluctuation, Ah Yin, the Blue Silver Emperor atop the small mound, swayed even more violently. Her weak soul was filled with anxiety and fury, and she wished she could immediately summon Tang Hao back to beat this shameless thief to death.

Unfortunately, her wish would not come true. Tang Hao was currently on his way to Suotuo City.

"Finally, it's mine..." Gu Yi grinned and closed the box again. In that instant, he stored the Hundred Thousand Year Soul Bone within it into his storage ring.

The reason Tang Hao had left behind this Hundred-Thousand-Year right leg bone was because, when the Blue Silver Emperor sacrificed herself to him, all six of Tang Hao's soul bones had already been gathered.

Otherwise, Gu Yi would never have had the chance to snatch it first.

Gu Yi casually tossed aside the black box. In its place, he held a small medicinal hoe and began transplanting the Blue Silver Emperor.

Soon, a faint glimmer flashed, and Gu Yi's figure vanished in an instant.

Only a complete mess remained within the stone chamber.

Cloud Sea Sect, First Line Sky.

Gu Yi transplanted the Blue Silver Emperor into his own small medicinal garden. After watering her with some liquid containing vital energy, he returned to his room.

Gu Yi sat cross-legged, with the Hundred-Thousand-Year Blue Silver Emperor Soul Bone before him, releasing gentle fluctuations of Soul Power.

Gu Yi slowly released blood-colored Soul Power and sent it into the Blue Silver Emperor Soul Bone, intending to investigate its structure.

This Blue Silver Emperor Soul Bone was the first soul bone Gu Yi had obtained.

Thus, he was exceedingly curious about its structure and wanted to know whether it was the same as a soul ring.

—Over the past six years, Gu Yi had studied soul rings countless times, both his own and Xiao Wu's. As a result, he now understood much of the mysteries of soul rings.

For instance, through his research into soul rings, he discovered that they contained countless complex runes and patterns. As long as Soul Power activated the runes and circulated according to the patterns, the corresponding soul skill could be unleashed.

As long as one could imitate the Soul Power circulation patterns of a soul ring and form them within the body's meridians, one could bypass soul rings altogether and cast soul skills independently.

Likewise, if Gu Yi's understanding of a martial skill or Dou Technique was deep enough, he could record it in the form of runes and patterns. Given sufficient energy, he could then condense a soul ring himself.

Of course, Gu Yi did not intend to condense soul rings himself, at least not before obtaining nine rings.

That was because, besides soul skills, soul rings on Douluo Continent also contained vast amounts of energy, and absorbing them could advance Gu Yi's cultivation.

Moreover, it possessed other properties and even contained a tiny fragment of this world's laws. Absorbing it could trigger Martial Soul Evolution and even grant those properties.

Back to the main point.

After some research, Gu Yi found, as expected, that soul bones and soul rings had similar internal structures. They were pure products of Soul Power, containing intricate and complex Soul Power patterns.

Once Soul Power was fed into a soul bone and circulated according to those complex Soul Power patterns, one could unleash the soul skill contained within the soul bone!

Realizing this, Gu Yi's thoughts began to race:

"Since soul bones are crystals condensed from energy, could I control the soul bone's energy during absorption, compress and condense it, and have it attach to only a single bone rather than all the bones in my right leg?"

Gu Yi's eyes gleamed. "If that works, then the number of soul bones I can absorb won't be limited to a mere six!"

There were roughly 206 bones in the human body. If Gu Yi's idea truly worked, then he could possess 206 soul bones in the future, giving him at least 206 skills that could be cast instantly!