"I just don’t know what is needed to cultivate a Yin Sha Evil Spirit and what kind of environment. The daily settlement panel can settle experience, but it seems that the Yin Sha Evil Spirit only waits for a Heaven and Earth Spiritual Treasure, and it is highly likely that the growth environment is extremely demanding."

Wen Jiu fell into contemplation, deciding to immediately research this issue once the East Spring Undying Bone returns. The cultivation of the Yin Sha Evil Spirit certainly cannot be directly asked about with Feng Jue, otherwise Feng Jue will surely suspect.

The Black Demon Soul, unlike other matters, can be known by one or two people without issue, sometimes a proper exposure is suitable for making friends. But the Black Demon Soul is related to the Heterodox Golden Core, and absolutely cannot be revealed to anyone.

Since it cannot be inquired about, then it will be explored slowly. It was conceived in the Innate Death Land, and in the Little Demon Realm, there should also be a suitable growth environment.

Five days passed in the blink of an eye.

During the return to the Little Demon Realm, all the True Demon Blood was refined, successfully reaching the Tier Two Upper Realm. The corpse body, perception, and the total amount of Corpse Qi were greatly enhanced, beginning with the Undying Bone’s corpse body. Wen Jiu attempted to utilize the Blood Corpse Escape fifty times consecutively again, and the Undying Bone could completely adapt.

This change is undoubtedly terrifying since as long as the corpse body of East Spring Undying Bone is within the range it can bear, the Blood Corpse Escape can be continuously used. When facing Golden Core Cultivators, East Spring Undying Bone can act with more composure.

Additionally, in times of confrontation, the suppression of the enemy will become even more terrifying. Because as one goes higher, the number of Middle Stage and Late-stage Body Cultivators becomes fewer, even if they exist, they only do so within great sects like Divine Extinction Thousand Peaks.

Even the Three Life Gates probably won’t have many Late-stage Foundation Establishment Body Cultivators, so the Undying Bone Body of East Spring Undying Bone, combined with the Middle Realm Thunder Spirit Demon Blood Body, means that during any magical confrontation, East Spring Undying Bone will have a terrifying dominance within the circle of Foundation Establishment Cultivators.

Besides the corpse body, the change lies in the total amount of Corpse Qi, which has multiplied two to three times compared to when it was in Middle Realm — though merely two to three times, previously the Corpse Qi within East Spring Undying Bone’s Dao Foundation and the Corpse Qi within its corpse body were already at a terrifying level.

Looking throughout the Divine Fall Mountain Range, there are hardly any Late-stage Foundation Establishment Cultivators who can compare, even Qi Guan Mountain, a noted late-stage cultivator, cannot. The total amount of Yin Technique in Qi Guan Mountain’s Dao Foundation only equals thirty percent of that in the East Spring Undying Bone post-breakthrough, evidencing the terrifying disparity.

With such a massive capacity for Corpse Qi, East Spring Undying Bone, merely in Tier Two Upper Realm, is already comparable to some Fake Pill Cultivators.

With the vast Corpse Qi complementing the Undying Bone Body, Wen Jiu is confident in controlling East Spring Undying Bone to kill most Foundation Establishment Perfection Cultivators.

Dealing with the True Disciples of Golden Core Cultivators might be a bit troublesome, but with an ambush, there’s a seventy to eighty percent chance of success.

Aside from the changes in East Spring Undying Bone, one thing that caught Wen Jiu off guard was the feedback from this cultivation level.

When East Spring Undying Bone reached Tier Two Middle Realm, there wasn’t much feedback in terms of cultivation level, only slightly stronger than during Foundation Establishment, merely allowing Wen Jiu to advance a bit from the Early Stage of Foundation Establishment, far from approaching the Middle Stage.

But this time, the feedback in cultivation level was three to four times as before, directly advancing the cultivation in the Yinzhou Heterodox Record Cultivation Technique to the Great Success Realm. Upon entering the Great Success, Wen Jiu’s cultivation also smoothly advanced, standing at the threshold of the Middle Stage of Foundation Establishment.

[Foundation Establishment Method - Yin State Heterodox Record: Great Success (1200/30000)]

This dual advancement brought Wen Jiu joy. Having entered the Middle Stage of Foundation Establishment himself, he feels more assured even if he needs to leave the Little Demon Realm in the future. Of course, having acquired the Yin Sha Evil Spirit, Wen Jiu will surely strive not to leave the Little Demon Realm.

Just as before.

Let the Three Corpses handle the affairs.

In addition to the delight from the dual advancement, one more thing also brought Wen Jiu joy, which is the feedback effect when East Spring Undying Bone entered Tier Two Upper Realm.

If the other two corpses can have similar feedback effects, once both Three Thousand Blood Inks and Blood Demon Undying Bone enter Upper Realm, he has a seventy to eighty percent chance of stepping into the Late Stage of Foundation Establishment.

As for why it’s not Foundation Establishment Perfection, it’s because the Yinzhou Heterodox Record currently can only be cultivated to the Late Stage, but given the current cultivation progression, he isn’t worried about not obtaining the second half of the Yinzhou Heterodox Record later.

Then, Wen Jiu carefully checked the panel of the Undying Bone.

Presently, East Spring Undying Bone, after digesting all the True Demon Blood, has entered the Upper Realm.

Moreover, the effects of True Demon Blood, even after reaching Tier Two Upper Realm, have not been diminished, thereby giving East Spring Undying Bone over ten thousand Corpse Nurturing Experience Points, making it only over thirty thousand experience points away from the peak.

East Spring Undying Bone (Tier Two (Upper Realm 23250/60000))

[Bloodline: (East Spring Undying Bone 0/100000) — Evolution Direction: Hegemon!]

[Skills: Thunder Spirit Demon Blood Body·Tier Two Middle Realm 20977/30000), Ghost Skill·Three Rivers Ghost Concealment Second Layer (0/1000), Blood Corpse Escape (Third Layer 0/2000)]

"Thirty-seven thousand experience points, who knows how long it will take to fill this up?" Expectantly, Wen Jiu awaited the return of East Spring Undying Bone.

Upon the return of East Spring Undying Bone, Wen Jiu immediately began corpse nurturing, while apportioning a thread of Soul Power to condense a new Corpse Soul for East Spring Undying Bone, afterward patiently awaiting the nurturing result to see how many Corpse Nurturing Experience Points could be gained in one day.

Subsequently, Wen Jiu used a Tier Two Lower Grade Isolation Talisman to seal the entire cave securely. He also constructed two barriers within using East Spring Undying Bone’s Divine Sense along with his own Divine Sense.

Ensuring complete security, so even if Fake Pill Cultivators conduct Divine Sense investigations, they could easily be discovered, Wen Jiu then probed his Divine Sense into East Spring Undying Bone’s body, aiming to carefully observe the Black Demon Soul.