This ancient Pill Formula was one of the three ancient Pill Formulas Yang Che found in the Spirit Medicine garden in Wulong Valley, specifically on the fourth floor of the wooden building managed by Sun An.

It was also the '廢方' (waste Pill Formula) that he had determined at the time required extinct Medicinal Materials and for which no substitutes could be found.

As for the other two, one was the Lei attribute 'Overlord Pill'.

Yang Che had refined a 'Pseudo Overlord Pill' using substitute Medicinal Materials.

Although its Medicinal Efficacy was certainly far inferior to a true 'Overlord Pill' refined with original Medicinal Materials, it was still the Medicinal Pill that Nine Heart Thunder Flame most loved to Devour.

The other one was called 'Soul Pill'.

At that time, Yang Che roughly thought that substitutes could also be found, but who knew that he had never been able to find 'soul fixing grass' to substitute for its main Spirit Medicine, so this Soul Pill could only be set aside by him.

And this ancient Pill Formula, which he had once determined to be a 'waste Pill Formula', was named 'Protect Yuan Pill'.

From the Medicinal Efficacy description, it was somewhat similar to the 'Nourishing Yuan Pill' he originally refined.

The Nourishing Yuan Pill's effect was that it could very well restore external and internal injuries.

However, as his Cultivation level gradually increased, Yang Che also found that the Nourishing Yuan Pill's Medicinal Efficacy began to weaken.

It seemed that after entering Foundation Establishment Late Stage, using Nourishing Yuan Pill for internal injuries was already very ineffective, so much so that later, every time he was injured, he would swallow a handful of them to heal.

And 'Protect Yuan Pill', in addition to being able to restore and treat internal and external injuries, also had a certain protective and restorative effect on the 'Primordial Spirit'.

Although the Pill Formula was vague, only stating that it also had a good restorative effect on high-level Cultivators, and did not clearly state what Cultivation level these high-level Cultivators represented, Yang Che believed that based on the Spirit Medicine used, it should be of great benefit to Core Formation and Nascent Soul Stage Cultivators.

As for the actual Medicinal Efficacy, that could only be truly felt and judged after it was refined in the future.

Yang Che carefully transplanted all the Spirit Medicine seedlings that could refine 'Protect Yuan Pill' onto the Mystic Ranked Spiritual Soil.

Thus, with the Mystic Ranked Spiritual Soil for cultivation, Medium Grade Spirit Spring water for irrigation, and the Spiritual Qi enhancement from the Spirit Eye Tree, Yang Che judged that these seedlings would mature in at most three to five years, and by then, a large amount of 'Protect Yuan Pill' could be refined.

He stayed in the Tongyou Medicine Garden for nearly half a month.

Yang Che felt that every time he diligently cultivated these Spirit Medicine and Spiritual Plant, his mood was exceptionally joyful.

On this day, Yang Che was watering the ten acres of ordinary Medicinal Plant fields with Spirit Spring water when suddenly, his eyes narrowed, and he immediately looked towards the massive stone chamber where Ancient Blood Corpse Mie resided.

With a slight frown, Yang Che moved his feet, activating the 'Swiftness' of the imitation Ancient Treasure Flash Cloud Boots, and he arrived before Mie's stone chamber like a flowing cloud.

The Spirit-Level Ancient Blood Corpse Mie was clutching his body, his eyes showing a painful expression, and occasionally, bloodthirsty red light flashed.

"Mie, what's going on?"

Yang Che's eyes narrowed slightly, and he asked indifferently.

Before Mie could respond, Tianxie Ziyin's voice suddenly rang out from not far away: "He hasn't drunk blood for too long, and his body has reached its limit. If he doesn't get fresh blood to drink, he will soon fall into a deep sleep."

Yang Che turned his head to look, only to see Tianxie Ziyin slowly walking over with a solemn expression, and she threw something to him.

Yang Che took it and saw that it was a rolled-up, transparent, silk-like new 'Magic Treasure'.

"Is it the new Magic Treasure after the Fusion of Jiao Entangling Silk and Flying Fire Meteor?"

Yang Che swept his Divine Sense and immediately sensed the familiar aura of Flying Fire Meteor.

Tianxie Ziyin nodded and said: "That's right. You can drip your Lifebound Essence Blood into it and nurture it in your Middle Dantian. As you continuously nurture it and your Cultivation improves, the power of this Magic Treasure will naturally increase. And most uniquely, you can also use the 'Devouring Thunder Art' to replenish different Heavenly Thunder within it in the future, to continuously enhance and perfect the power of this Magic Treasure."

After Tianxie Ziyin finished speaking, she quickly turned around and coldly said to Ancient Blood Corpse Mie: "Mie, you can Devour a portion of the Star Pattern Beast in Starfall Mountain. In the future, your master will also continuously capture Yao Beasts into this world for you to drink their blood. Remember, although he is not your true Reincarnation master, you have already successfully connected your souls. The stronger he is, the better you will live, otherwise, you will only suffer countless hardships."

Ancient Blood Corpse Mie's eyes immediately lit up, then he nodded vigorously, and then looked at Yang Che with a fawning gaze.

Yang Che said indifferently: "Go."

Ancient Blood Corpse Mie then howled and rushed towards Starfall Mountain.

Watching Mie's rapidly disappearing back, Yang Che also seemed to understand why the strength Ancient Blood Corpse Mie could unleash was very high at first, but then became lower and lower; it turned out to be greatly related to 'drinking blood'.

Withdrawing his gaze, Yang Che refocused his attention on the new Magic Treasure in his hand.

Without any hesitation, he dripped a drop of Essence Blood into it.

Immediately, this Magic Treasure glowed with dazzling white light, and its form also changed.

Originally, it was a rolled-up layer of almost transparent silk threads, but now the silk threads unfolded, and at every uniform distance, a Flying Fire Needle was integrated into it.

It was as if the original Jiao Entangling Silk had suddenly strung together all three hundred and sixty Flying Fire Needles.

With a thought, the Flying Fire Needles actually flew freely as before, completely unaffected in the slightest.

They could even still perfectly form the 'Tai Xuan Hidden Light Formation'.

The only difference was that no matter how these Flying Fire Needles changed, there were magically connected transparent silk threads between them.

The Jiao Entangling Silk was originally refined from the tendons of an unknown Dragon, and after being re-melted by Tianxie Ziyin this time, it became even more flexible, able to firmly connect each Flying Fire Needle tightly, no matter how the Flying Fire Needles changed.

Even more bizarrely, as Yang Che's 'Extreme Power' was injected, he found that both the Flying Fire Needles and these transparent silk threads had faint electric arcs flickering, and they became stronger or weaker as his Extreme Power increased or decreased.

Clearly, this Magic Treasure already possessed the Lei attribute, making it very suitable for nurturing in the Middle Dantian.

After absorbing this Magic Treasure into his Middle Dantian with a rather good mood, Yang Che asked doubtfully: "Zi Yin, where is the original Meteor Box?"

"The original Meteor Box was refined from a rare control-type Material, so this King has already shattered it and integrated it into your new Magic Treasure. Otherwise, how could the original Jiao Entangling Silk be so flexible now, and how could it maintain a free connection between the Flying Fire Needles no matter how they change?"

"So that's how it is."

Yang Che suddenly understood.

Then Tianxie Ziyin suddenly said seriously: "Yang Che, due to some coincidence, this King helped you refine this Magic Treasure for your Middle Dantian. But the dark attribute Magic Treasure for your Lower Dantian, you will have to refine it yourself.

As for how to refine it, you can refer to the 'Silent Extinction Scripture'. And this new Magic Treasure, which combines Flying Fire Meteor and Dragon tendons, is more suitable for hiding in the dark, for unexpected uses."

Yang Che was stunned for a moment upon hearing this, then he understood Tianxie Ziyin's meaning and nodded: "Hmm, I understand. But the name of this new Magic Treasure...?"

Tianxie Ziyin said: "You can name it yourself. As one of your Lifebound Treasure, it may even accompany you for your entire life, so just give it a name you like."

Yang Che pondered for a long time before saying with a joyful expression: "Let's call it 'Flying Stealth'."

Tianxie Ziyin nodded, but her expression was indifferent, without any extra emotions revealed.

"Zi Yin, for the next ten years, I will fully Cultivate the 'Heaven and Earth Chaos Art' to provide you with Ancient God Power."

As soon as Yang Che's words fell, Tianxie Ziyin's expression suddenly changed, and then her already cold face became even more frosty and intimidating.

"Let's go, follow this King to kill someone."

Tianxie Ziyin moved and left the Void Illusion Magic Stone Space.

Yang Che, filled with doubt, followed closely behind.