Meanwhile, Charles suddenly thought of something and asked.
"What would've happened if I entered inside the dome along with the System Cube and started training? I've more than 30,000 years of lifespan, right?"
"That would be the foolish decision, lad. Although you could train your body and might even use that much time to comprehend spell models, is it worth sacrificing your lifespan? You could finish the comprehension process in a century or two in real-time. So, what would you do next? Play some ping pong game?"
'Yup, that was the stupidest question I have ever asked.'
Charles went silent upon hearing those words. Then, he glanced at the underground hall, chose a suitable place to sit, and entered his Inner World to continue his comprehension work.
Meanwhile, multiple strange artifact mutations started to occur deep inside the System Cube.
The first one was due to the 'Eye of Insight' stone. Like Runeth had predicted, the strange stone assimilated into the System Cube during the first millennium time and started turning the infant-like consciousness to mature speedily.
The leaking insight essence was more than enough to do such change in the System's Soul.
The second one was due to the 'Dice of Disaster' artifact. The strange Dice also broke into pieces during the first millennium, and the true essence of 'Disaster power' and the Will of Goddess Myxenta started merging with the System itself!
The third one was due to the 'Mysterious Black Book' which Udnir placed in Bishop's hand.
Like other artifacts, the Mysterious Black Book also merged with the System's soul, released strange Future-Time essences, and started mutating the artifact's soul.
The fourth one was due to the Star Watch.
The fifth one was due to another strange ring that Runeth placed personally.
All these massive amounts of essences entered the System Cube from the five slots and caused changes under the manipulation of Runeth's Astial array inscriptions.
Following the next few millenniums, the 'Eye of Insight' stone increased the System Cube's true insight and formed a connection Link towards the System's soul itself!
Around this time, the System Cube managed to move in the air on its own and started moving here and there like some 5-year-old kid.
It sometimes looked at the outside world curiously and even tried to smash itself on the dome to break it. Although it didn't have an eye, Charles and Runeth sensed a newborn's gaze from inside.
Thirteen millenniums later, the Nature essence sealed the real 'Insight' essence weakened considerably at some point and soon broke into pieces.
Without any understanding, the System Cube's soul absorbed the newly appeared Insight essence like some hungry wolf and soon started to bulge like a balloon!
Due to the massive Insight Essence, a sudden change occurred within the System Cube and caused the whole artifact to crack in multiple areas.
Even Charles got startled by that change and almost thought they failed to create an upgraded artifact!
But, this incident triggered the previously gathered 'Luck' power to use up exponentially!
The 'Miracle' effect took place at this time.
At that moment, a strange invisible power came out from the deep space, formed some link with the System Cube, and startled healing the System itself!
Runeth suddenly stood up from the nearby chair as he saw this and hastily walked towards the dome.
After some inspection, he let out a deep gasp and almost stopped breathing for a few seconds.
"Hahaha! It's the Wisdom Link. I knew this would happen when a soul absorbs too much Wisdom Essence." A burst of crazy laughter echoed in the underground basement hall as Runeth stared at the change happening in the System Cube with a wide grin on his face.
Although Charles didn't understand much about it, he knew it was all within the old man's expectations.
Following that incident, the 1-meter tall Red Cube started to shrink slowly.
But what made Charles and Runeth to be surprised was that the System Cube suddenly became silent!
It didn't move a single bit and remained in the same place for the next thirty-one millenniums!
Thirty-one millenniums later, the large red-colored system cube had turned into a size of a pebble and appeared spooky!
Around this time, the 'Time-Elemental Crystal' was also used up and disappeared from there, causing the 'Time Flow' inside the dome to slow down.
"It's over!" Both Charles and Runeth woke up from their seats and moved towards the dome layer.
At that moment, Charles shifted his attention towards his own body and was pleased inside.
During the four years, he didn't waste a single moment and focused his full attention on comprehension and training his body.
'My body had already reached the Radiant Knight level. As for spell models, I already comprehended [Purple Word] and [False Field] spells.' While thinking, he arrived in front of the reddish dome and stared at the small pebble-like artifact in excitement.
"What do you think? Shall we remove the dome now?" Runeth asked as he crossed his arms and stared at the upgraded artifact in anticipation.
"Let's do it." Charles also nodded, shifted his gaze towards the ceiling, and added.
"Zera, lock this space in the underground basement."
"I locked it a while ago, Tower Master." An illusionary appearance of a young female elf appeared next to him and stared at the pebble-like Red Cube in curiosity.
On the other hand, Runeth recited another long chant and ended it after 10 minutes.
The next instant, the golden dome started to break into countless pieces and soon disappeared from the hall.
"Go and check the artifact. Try to sense if your soul imprint is still intact." Runeth added.
Meanwhile, Charles nodded his head, walked towards the small pebble-like cube, and soon arrived in front of it.
Then, he released his wisdom power and tried to scan it.
The next instant, a strange suction force appeared from the cube and tried to absorb his wisdom power!
No, it appeared more like scanning!
Charles also noticed his soul imprint in the artifact's soul and allowed it to scan him.
The next instant, a strange synthetic voice echoed inside his head.
It was neither male nor female.
[Host's soul matches with the imprint!]
[Initiating System Assimilation Process!]
The pebble-like artifact turned illusionary the next instant, entered Charles's head like a ray of light, and soon shrunk into a minute level.
Before long, it entered into his main consciousness and attached itself to it!
In truth, his main consciousness, soul form, elemental form, and physical body had long fused and became inseparable. Although they appear in different forms in different realms, they were all one in some sense.
So, he wasn't surprised at all.
After a few seconds, the same synthetic voice echoed in his head.