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"Yes, my lord!"

The gray-robed men accepted the order and quickly left.

And then, a few gray-robed figures flew over from afar.

Seeing them coming over, the face of the grey-robed leader in front of them immediately darkened.

Xiao Yan's eyes swept across them and asked in a deep voice, "How is it? How is it?"

Hearing this, several gray-robed people cupped their fists and bowed respectfully.

"Sir, it's almost done."

"Very good!" Hearing that, grey-robed leader nodded his head in satisfaction.

"Master, this is the blood essence that you wanted!"

Suddenly, a strange red light flashed.

Several vats of blood that flickered with a strange red light appeared in front of the gray-robed man.

Looking at these vats of blood essence, grey-robed leader's eyes flashed with a crafty smile.

"Haha, very good, very good!"

He threw his head back and laughed.

"Lord, if there's nothing else, we'll be leaving!"

"Alright, you guys go ahead. Remember, kill them all. Leave no one alive to strengthen our Undead Legion!"

"Yes, my lord!"

The few gray-robed people respectfully retreated.

A strange smile flashed across grey-robed leader's face as he waved his sleeve, causing the several crocks of blood essence to disappear.

Shortly after, he disappeared.

When he reappeared, he was in an ancient underground karst cave.

This underground karst cave was covered by a huge Ghost sect formation with a pool of blood inside.

The blood pool was calm like stopping water, but as the grey-robed leader got closer, the water in the pool started to ripple, quickly spreading outwards.

Then, it started to bubble as if it was boiling.

Suddenly, the sound of breaking water could be heard.

A blood-red blood skeleton suddenly sat up from the pool of blood.

At that moment.

The entire underground karst cave was filled with blood energy.

If one looked carefully, that blood skeleton was not as simple as just skeletons.

Flesh and blood actually grew from its bones. Rays of blood vessels shaped like old tree roots and coiled whiskers covered its entire body. The blood within the blood was rapidly flowing.

On the blood skeleton's chest, there was even a blood-red heart, and on the top of its head, there was even a slowly wiggling brain.

The dead blood skeleton actually grew flesh?

Legend has it that within the Ghost sect's Spirit Arts, the blood skeleton needed to be raised by the blood essence in order to form.

Just how many lives had the Death blood skeleton in front of them already grown flesh and blood? How many blood essence had it absorbed in order to raise it to such a state?

Just thinking about it made his scalp tingle.

However, the grey-robed leader in front of him was looking at the blood skeleton, his eyes flashed with a sly smile.

"Hehe, not bad, not bad. With these human blood essence, the Death blood skeleton can successfully grow flesh and blood. In the future, it will become this sovereign's general!"

The Death blood skeleton, it was said that it had a very strong battle power. Once it was born, there would be countless living spirits that would burn it.

Heavenly Imperial Palace, the center of the immortal estate world.

Inside the ancient palace, Lu Jiangxue was tied to a stone pillar with all kinds of tied up. There was even a handkerchief stuffed in his mouth, causing her to only be able to emit creaking sounds.

Looking at the ancient palace in front of him, Lu Jiangxue tried to struggle, but to no avail.

At this moment.

In front of the main altar in the main hall, a gray-robed figure was kneeling.

"Sky Sovereign, this subordinate has caught a cultivator with a suspicious identity!"

The gray robed man knelt on the ground and respectfully reported to the altar that only had a mini immortal estate on it.

"What's wrong?"

A deep voice came from the top of the altar as soon as the words left his mouth.

His voice contained boundless divine might.