Absorbing the energy from the Innate Bone of the Fiendgod required a certain degree of preparation because it wasn't that easy to just simply refine the Innate Bone of the Fiendgod, not to mention the Innate Body that was of the Tier 4 Fiendgod.

Meaning the Innate Body was very powerful and potent, so it required a lot of care and cautiousness.

Yakou did everything as he was instructed to do so and even had the support of the Arrays and Fūinjutsu Seals that were within the cultivation chambers installed for the purpose of controlling the enviroment.

When it came to refining the objects like the Innate Bone of the Fiendgod, it contained the Primal Essence of the Fiendgod.

It was like the fundamental essence of the Fiendgod, which was very beneficial for someone who wanted to strengthen his physique.

Slowly, the Innate Bone of the Tier 4 Fiendgod started levitating in front of Ōtsutsuki Yakou, who was sitting cross-legged. In contrast, invisible energies started filling the room, which was the aura of the Innate Bone of the Tier 4 Fiendgod, as Yakou started the refinement process.

The first step of the entire process was to draw out the enrgies from the Innate Bone of the Tier 4 Fiendgod; only after enough aura was drawn from the Innate Bone did Yakou start carefully rotating the aura in this air, with the help of the Fūinjutsu Seals that were all over the place. 

When the rotation speed reached the required standards, he started slowly and carefully absorbing the aura of the Innate Bone into his very own body, according to the instructions of the Myriad Fiendgod Celestial Revolutions Heaven Tome.

When the Fiendgod Aura entered his body, Yakou noticed that it didn't behave aggressively at first, but that assumption didn't last really long because, after several moments, he felt enormous pain as the Fiendgod Aura started fighting against his own Chakra. 

At the same time, Yakou hastily activated the Fūinjutsu Seals that instantly eased the pressure on his person and he started refining his body with the Fiendgod Aura slowly, but the process wasn't any less painful than it was before. 

Yet, he could see that the Fiendgod Aura was penetrating deep into his muscles and bones, attempting to infuse itself into the flesh and bones in a more aggressive manner. This resulted in the process of destruction and reconstruction that was taking place within his body.

Every time more and more of the Fiendgod Aura from the Innate Bone entered his body, supported by the enormous amount of pure Chakra that was extracted from the Chakra Fruits, large parts of his body were destroyed and reconstructed on the atomic level.

Simultaneously, it also led to the strengthening of his very own Bloodline because he sensed that some of his racial abilities stemming from his Bloodline were getting stronger the longer the process took place.

The pain was getting more and more potent and powerful with each moment that passed; it was already bordering the unbearable degree, but Yakou was forced to withstand the pain as it was part of the body tempering.

As unfortunate as it sounded.

Having your very own body destroyed and reconstructed on the atomic level, several times over and over and over and over, at an incredible speed accompanied by enormous pain, wasn't any win.

But at the same time, Yakou found out that his physique got several times stronger just by slowly advancing to the 1st Celestial Revolution of the Myriad Fiendgod Celestial Revolutions Heaven Tome. 

When he focused his senses a bit more, he noticed that within his body, a translucent silverfish pagoda was beginning to take shape. It was very small in size, but it was clearly the thing that he was waiting and aiming for to complete.

This was a sign that he was nearing the competition of the 1st Celestial Revolution of the Myriad Fiendgod Celestial Revolutions Heaven Tome as the Silver Pagoda was taking shape after more and more Fiendgod Aura was absorbed and reinfed by Yakou.

After achieving the 1st Celestial Revolution, Yakou would attain a Physique that was comparable to any Tier 1. What was a bit more complicated was the fact that due to several Body Forging Rituals that he underwent during his life, he wouldn't get any substantial increase in strength.

However, what he would obtain would be increased regenerative factor, healing factor, resistance against poisons, increased senses and reflexes and some other things that were minor benefits from achieving the 1st Revolution.

After another hour, the process was almost completed because the formerly translucent Pagoda was now clearly silver in color and almost solid. Only a bit of the Innate Bone of the Tier 4 Fiendgod, as Yakou refined almost everything in it.

He was already feeling very tired; he was feeling very, very tired from the entire process; only a bit have remained and even the Chakra Fruits were completely used as they were used as the supplement for the body tempering. 

His fleshy body now had a much stronger regeneration and healing factor, as he observed how much faster he was healing from the injury that he suffered during the process of the body tempering. 

After several more moments, the remains of the Innate Bone of the Tier 4 Fiendgod literarily dispersed into countless particles, which were then fused into Yakou's body, more precisely into the Silver Pagoda within his body that now became compelled.

With this, the entire process was completed and Yakou officially achieved the 1st Revoltuon of the Myriad Fiendgod Celestial Revolutions Heaven Tome.

For the next ten minutes or so, he remained seated cross-legged within the cultivation chambers as he waited for his newly found regeneration and healing factors to kick in and heal him enough.

After half an hour, when he felt that he could move without feeling pain, he stood up and stretched out his body a bit before he exited the cultivation chambers and decided to head home for now. 

Tomorrow, he would need to report to his grandfather and attend lessons on the Dao Preach about Myriad Fiendgod Celestial Revolutions Heaven Tome because while he comprehended the basics, he needed to raise his understanding about the topic.

To better utilize his own strength and power. 

Learning to utilize his power would be one of the most crucial things that Yakou would need to learn because now, the power of his fleshy body was rising and once he achieved the 4th Celestial Revolution his physique would be many times stronger than right now.

***

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