The Corpse Bear also began to absorb Yin Sha spiritual energy with all its might. Within the secret chamber, streams of gray-black Yin winds surged towards the Corpse Bear.
This scene lasted for a long time.
Until most of the Yin spirit stones laid on the ground were consumed, the Corpse Bear was enveloped in layers of Yin mist.
Suddenly, a roar came from the mist, and the black mist surrounding the Corpse Bear turned into a black wind, spinning continuously, with streaks of faint blue light flashing within, looking very strange.
Zhang Ling also suddenly opened his eyes, a white token appearing in his hand. Several magic seals were cast upon it, and the token immediately lit up with a layer of spiritual light, turning into a yellow beam that shot out of the secret chamber and disappeared.
At this moment, a wisp of his divine sense was attached to the token, controlling it to quickly shuttle through the soil, and soon it flew to the ground.
As soon as the white token left the ground, it flew into the air over fifty feet high, and then it stopped in the air, spinning around, emitting a layer of white light.
As the token was activated, white pillars of spiritual light rose from the surrounding mountains and forests within a few breaths, striking the sky.
Soon, a layer of white mist formed, covering this area, completely enveloping this side of the mountain.
This was a set of formations to conceal spiritual energy fluctuations. The white pillars of light just now were the spiritual light emitted by several formation flags.
Zhang Ling had already set up the formation here. Once the Corpse Bear began to advance, he would activate the formation to hide the celestial phenomena generated by the advancement.
After all, it was difficult for zombie-like monsters like the Corpse Bear to advance, and the resulting phenomena were very different from those of human cultivators.
Even the records in the classics were not many, so to prevent others from interfering, these preparations would give him more peace of mind.
Outside the formation, if cultivators used their divine sense to investigate, they could only detect a faint white mist at most.
Inside the formation, in addition to the white mist, one could occasionally detect wisps of Yin winds gathering slowly, all surging underground.
This scene lasted for two or three days. The underground secret chamber was pitch black, filled with black Yin winds.
Suddenly, a pair of blood-red eyes opened within the Yin wind. Clusters of Yin wind frantically swept towards the location of those eyes, and fluorescent lights formed by black wind could be seen in the air.
After a while, all the Yin wind in the secret chamber disappeared. A tall humanoid creature stood in the center.
This monster was covered in a dense layer of purplish-black hair. Each hair stood up like a steel needle, looking ferocious and terrifying.
Suddenly, the monster chuckled a few times, and a layer of gray-black spiritual light covered its body. The hairs on its body actually shortened rapidly, all disappearing into its body. Now, looking at the monster's appearance, its body was covered in purplish-black skin, and it looked more and more like a human.
Then, the monster raised its two claws and waved them quickly a few times. Immediately, several inches long, pitch-black sharp claws grew out of its large claws, creating sounds of tearing wind in the air.
Suddenly, a flash of spiritual light appeared beside it, and a yellow light round shield emerged. The monster roared and waved its claws quickly, and more than a dozen gray-white claw芒s struck the yellow shield.
After a series of muffled sounds, the shield cracked and shattered.
Then, a black light flashed on the monster's body, and it turned into a black wind, quickly shuttling through the secret chamber.
Its speed was extremely fast, and only afterimages could be seen. Suddenly, the monster stopped, and a large mouth spewed out a fist-sized ball of gray-green mist, which directly hit the wall, and a strange hissing sound was heard.
Green smoke rose from the wall, and after the smoke dissipated, a pit more than two feet wide appeared on the wall. The soil and rocks in it had been melted, and this pit was black-green and bubbling, looking very disgusting.
Sizzling sounds and bubbling sounds continued to come out, and the pit was still being corroded, expanding several times in a short period of time.
Zhang Ling walked to the pit and looked at it carefully, and couldn't help but chuckle. "Hehe, it has successfully advanced. The power of this corpse poison is terrible if it hits someone." He nodded with satisfaction. The strength of this advanced Corpse Bear should not be underestimated.
Just now, he condensed a Profound Spirit Shield and let the Corpse Bear attack it. The shield was broken in an instant.
Although that spirit shield only used half of his strength, and he did not use the Qingbai Qi from his natal magic weapon to reinforce the shield's power, the defense of that shield was much stronger than ordinary body protection spirit light.
This also reflected the strength of the Corpse Bear after advancement.
Monsters like the Corpse Bear, which are zombies with intelligence, have a physical strength that is several points stronger than that of monsters of the same level. They are very suitable for close combat. If he let this advanced Corpse Bear get close, Zhang Ling was afraid that he would not gain much advantage.
Then, Zhang Ling commanded the Corpse Bear to sit cross-legged on the ground, carefully sensing the condition of this clone.
The Corpse Bear after advancement was already a high-level monster, but at this moment, under the divine sense attached to it, in addition to sensing the rich Yin Sha corpse Qi, no golden core was found in the Corpse Bear's body.
This seemed a bit strange, but Zhang Ling was not surprised.
There were records of this in some classics. Zombie-like monsters were neither living beings nor pure demon ghosts. They were very special in themselves.
It was said that even if the strength of a corpse monster reached the Nascent Soul level, it would not condense a Nascent Soul in its body. There was only a certain chance that a corpse core would be formed in its body.
The so-called corpse core sounded similar to the golden core of a cultivator, but it was completely different. Even demonic cultivators who specialized in cultivating zombies did not know much about it.
He had also consulted some classics, only knowing that a corpse core had a certain chance of forming in the body of a high-level zombie. The reason for its formation was unknown, and it did not seem to be limited by cultivation.
It was said that zombies that condensed a corpse core also mastered some strange supernatural powers and were extremely powerful.
But not having a corpse core did not affect the strength of zombies. Most of their strength was in their physical strength.
It was said that some special corpse monsters might also master strange supernatural powers.
For the next few days, Zhang Ling was carefully sensing the strength of the Corpse Bear after the breakthrough.
This clone did not condense a corpse core and naturally did not master any special supernatural powers, but Zhang Ling was still quite satisfied.
The hair on the Corpse Bear's body could be transformed into a black-purple scab material, like scales, covering its entire body, which could greatly increase the Corpse Bear's physical strength, comparable to ordinary magic weapons.
Even the newly refined flying sword could not break the Corpse Bear's defense in a short time. Of course, this did not include his use of sword control.
In addition, the corpse poison attached to this Corpse Bear was also a good attack power.
With this clone, Zhang Ling's strength instantly increased several times.
