In an instant, the man with the mustache felt a chill run through his entire body.

Everyone present were researchers and staff with little understanding of the Martial Arts Dao, but as the person in charge of such a significant event, the man with the mustache had a reaction far exceeding others.

"Something's happened!"

The man with the mustache roared in his heart. Whoever dared to infiltrate this place must have some means, and he knew his own abilities in the Martial Arts Dao—taking action was like a mantis trying to stop a chariot.

He reacted swiftly and was about to shout in anger.

"Third Uncle, Fourth Uncle!"

However, just as he uttered these four words, a power unimaginable suddenly surged through his heart and spirit.

The man with the mustache, although not weak in heart and spirit and having reached the Tier Three height, found himself overwhelmed like a fragile boat in a storm by that force.

Whoosh!! Whoosh!!!

In mid-air, the sound of space being torn apart resounded, ripples appeared, and two figures suddenly tore the space open to emerge.

The aura around these two was icy cold; one wielded a long saber, while a few flying sabers floated behind the other.

The terrifying killing intent swelled within the entire laboratory like a sea of blood in an instant.

The weaker experiment personnel felt their knees buckle, collapsing to the ground, with some of the less resilient directly fainting on the floor.

The moment these two appeared, the entire laboratory was enveloped by an invisible aura, and any movement would attract unimaginable attacks.

They were undoubtedly two terrifying Celestial Beings.

Seeing no abnormalities in the laboratory, their aura slightly retracted, and the figure with the floating sabers behind him dispersed instantly, as if he had never appeared.

The other then looked at the man with the mustache: "Old man, why are you panicking? We thought something had happened."

"Your Fourth Uncle was in the middle of cultivation, and you called him out. Look at his face, as black as the bottom of a pot."

This Celestial Being spoke with a simple and honest expression, his killing aura dissipating, looking like an ordinary farmhand.

"Third Uncle, do you see this child, suitable to be 'clothing' for the Ancestor?"

The man with the mustache quickly spoke up.

Upon hearing this, Third Uncle's gaze fell on the boy, and he couldn't help but click his tongue twice: "This child is indeed handsome."

"Not bad, not bad, the Ancestor will certainly like him. But old man, I don't understand the experiments you're doing here. I only handle your safety, so don't involve me in this..."

"Apologies, Third Uncle, I was too excited just now. Thinking we have the chance to become the main line..." The man with the mustache spoke with a slightly excited tone.

"Calm down, calm down. Our line has waited for this opportunity for too long. We must be cautious, extremely cautious."

Third Uncle spoke, then patted the man with the mustache on the shoulder, whispering in a voice only both could hear.

"Besides being cautious, you need to be more ruthless. Old man, your heart isn't ruthless enough. In the future, don't bother sending children who don't meet the standards."

"Third Uncle's Blood Refining Broken Saber still requires a blood sacrifice. Remember, the dead are the best at keeping secrets."

His voice remained honest, but the implication in his words made one's skin crawl.

"Understood, Third Uncle." After pondering for a long time, the man with the mustache nodded.

Only then did Third Uncle smile in satisfaction before his figure suddenly disappeared.

After he left, the surrounding staff began to resume work one after another, while the man with the mustache directly picked up the boy in front of him.

"This child meets the standards well. I'll take him, let him return to a normal routine, and naturally adjust his body to reach its optimal state."

Hearing this, the other staff had no doubts and let him take the boy away.

Soon, the man with the mustache took the boy through the 'door' to another layer of space, entering a room.

There was no laboratory here; instead, it was a series of warm rooms equipped with all kinds of living facilities.

As soon as they entered the room, the previously sleeping boy slowly sat up, while a hint of purple appeared in the man with the mustache's eyes.

This boy was Su Tu, and the first instruction he set for the boss was to have him brought to the laboratory.

The aura of the two Celestial Beings just now was even more powerful than those three on the Ancestor Star.

That day, Su Tu relied on the constraints of the Ancestor Star to annihilate them, but here on New Star, the Martial Artists were no longer suppressed; confronting two Celestial Beings head-on was evidently unwise.

"What is the Heaven-Extending Pill?"

Without any hesitation, Su Tu looked at the man with the mustache and asked.

"The Heaven-Extending Pill is a type of life-extending elixir that can be used indefinitely. One pill can extend the physical body's life by thirty years and has no restrictions.

But the success rate of this elixir is extremely low, with only one furnace out of ten thousand pills producing one." The man with the mustache responded.

Su Tu nodded upon hearing this. Any life-extending medicine would have limitations, such as being consumable only once or damaging cultivation.

As the saying goes, with every gain, there is a loss, and since the Heaven-Extending Pill has no side effects while being capable of granting continuous life-extension,

this elixir must be extremely difficult to craft.

"Does this elixir require children's blood as a guide?"

Su Tu recalled the facilities he saw during the experiment; those instruments extracted the essence from the blood with a special force, invisible to the naked eye, making no blood color apparent in the devices.

That essence then fell into the blood pool, nurturing the pill furnace situated above.

This was why Su Tu asked such a question.

"No, the children's blood is sacrificed to the Evil Gods. We contacted a Subspace Evil God through the Three Deceits Cult, and that Evil God can increase the success probability."

"As a price, it requires us to provide blood essence from children with high talent..."

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