After several days of preparations, I was going to reach the Super-Devil Class by Devouring the second Dragon core I have obtained from the corpses of Albion and Ddraig.

I have decided to reach Super-Devil Class before going to find Azrael, as our meeting would for sure end in a fight, and as Satan-Class, albeit now with combat prowess matching that of weaker Super-Devil Class, I still couldn't rival someone like Azrael.

That was too way out of my league.

So thus, reaching Super-Devil Class was my priority. Unfortunately for me, it was also a kind of level cap that could be achieved quickly.

Even though Draconic Deus was basically a Grade 3 Plane, its environment was comparable to the Grade 5 due to the existence of the Dimensional Gap. That meant that after reaching Super-Devil Class, I would be advancing in that Class very, very slowly.

For example, one thing that could significantly speed up my advancement in terms of Demonic Energy reserves was Superior-Grade Demonic Energy Crystals. Still, those were almost impossible to find in the Underworld, and High-Grade ones were maximum.

So my only choice for a fast advancement would be to trade something during the meeting of Longinus Dreizhen Orden. Or to Devour some Great Gods, after my Devour reached Ultra-Order Rank, which was doable after training for hundred years in it intensively.

Currently, I was in the underground complex of the Fuerig, which served as a testing field for my dangerous experiments or when I tried magic rituals or similar things. This time, I wasn't alone, as Hela came with me to watch over me.

She was already a Greater God with over 7,000 Units of Divine Power and 10,000 Units of Magical Power. Her training speed was extremely terrifying due to her being an Innate God; additionally, she practiced a unique technique that allowed her to convert Magical Power to Divine Power and increase her reserves. More she used it, the higher her Divine Power rose, and the same could be said about her Magical Power, that due to constant drain and regeneration was expanding naturally.

"Are you going to start?"

Asked me, my lover, as she stood there in her battle armor.

"Yes, when I activate the barrier and start devouring the Dragon Core, start supporting the barrier with your Divine Power. If something goes wrong and energies from the Dragon Core of pinnacle Heavenly Dragon goes berserk, then it would be a problem."

Last I got Architect to help me regulate the energy flow with some supplementary magical formations, but that was not enough. I noticed afterward that it was a significant risk, and only someone at a similar level of power could properly regulate it when something happened.

Now, my Devour has already reached Master-Ranked mastery, so it should go easier compared to before. The higher the Mastery over the Devour was, the more energy I could absorb. Not to mention, if I had comprehended the Law of Devouring, then absorbing Dragon Core like this would be in a split of a second with 100% absorption.

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"Architect activate protective wards and barriers from 1 to 10. Hela starts supplementing them with Divine Power and takes control of the Command."

I said as several magical barriers were erected around me as I took the Dragon's Core from my Dimensional Storage.

After looking at it for several seconds, I used Devour on it and started absorbing the energy from the Dragon Core.

When trying to reach a higher Class, the process was different, and I wasn't sending the converted energy to my Hearts to increase my Demonic Energy Reserves. Still, instead, I was concentrating on it at one point until it reached maximum, and my reserves started expanding on their own.

When that started, I knew I had reached the higher Class. This system was very similar to the Warlock Cultivation System and Evolutionary System of the Fiends of Abyss.

Truth to be told, it hurt like hell, as I was concentrating the enormous amount of converted Demonic Energy in my two Hearts, which were centers of my Energy Reserves.

Only after several hours, my Hearts start absorbing the concentrated Demonic Energy that I had been devouring and converting, and now my Demonic Energy Reserves started rising as they soon broke through 1,500, and after another ten minutes, they reached 2,500, which was starting point for Super Devil Class or Greater God or other equivalents.

And it didn't stop at the meager 2,500 but kept increasing as my Demonic Energy Reserves were getting expanded, purified, more potent, and denser.

3,000

3,500

4,000

4,500

5,000

5,500

6,000

6,100

6,120

6,125

In the end, I managed to reach staggering 6,125 Units of Demonic Energy by devouring the second Dragon Core belonging to the pinnacle Heavenly Dragon.

Gainst from the second one was much better compared to those from the first one.

Power System of us devils was very similar to Warlocks of the Astral Boundary and Fiends of the Abyss till Super-Devil Class including.

The only thing the devil needed to do was to accumulate enough Demonic Energy to break through the constraints over his energy core, which was his heart. If he did so, then he would evolve and reach a higher class.

This was a combination of Warlock Cultivation and the Evolution of Fiends.

From then, it consisted similar path to Arcanist, as one must comprehend a Law.

Whoever created basics for our species was a genius on his own.

Soon enough, I felt the Will of the Underworld descend upon me as my entire body froze.

Already a very familiar feeling.

'Isaiah'

'Isaiah'

'Isaiah'

Sounded a now familiar creepy voice in my head belonging to the Will of the Underworld, precisely three times as always.

'Isaiah - When in the Underworld, regeneration is several times faster, no matter of what type. Recovering from fatal damage is easier. The Soul is tied to the Underworld; by sacrificing part of your Energy Reserves, you can be reborn.'