Chapter 768: Ninth-Level Main Brain Heart

Until now, Lei En finally had time to study his own advancement carefully.

This time, even he couldn't recall exactly how much energy the MutatedPhone had absorbed. The energy in his Soul Power Pool rose and fell like a roller coaster, increasing every second while also being consumed each second, never stopping since the battle began.

Across the battlefield, countless clones, each Thundercast Celestial Soldier and each Electric Light Cannon, absorbed the souls of most enemies killed within their three‑kilometer range.

Outside the city walls alone, the Undead Army numbered seventy to eighty thousand.

There were also the Black Soul Knights, teleported to Shield Island to charge at Getan, numbering twenty to thirty thousand.

Even though the phone's conversion of absorbed souls incurred heavy loss, the sheer volume of souls yielded far more energy than before, nearly bursting the Soul Power Pool several times.

Especially outside Yongge City.

The Master cast the Ten-ring Spell "Eternal Blazing Sun", killing over a hundred thousand Undead Army in seconds. In that instant, because the Thundercast Celestial Soldiers were at the wall breach and too far, they only absorbed a small portion.

But Lei En himself, standing in the middle of the battlefield, had his Soul Power Pool completely full!

He didn't know how many undead demon souls were absorbed; the massive energy nearly crashed his mind and couldn't be drained. Even after selecting every upgrade icon, the Soul Power Pool showed no sign of decreasing.

Fortunately, Lei En reacted quickly and shut off the soul‑absorption function in time.

He guessed that at least seventy percent of the energy was wasted.

Regrettable, but unavoidable—the Soul Power Pool's capacity was too small. Wasting energy is far better than having his brain explode.

On the phone's interface, each icon glittered brightly.

The Soul Power Pool was also full, with three thousand energy units remaining.

Lei En carefully sensed his Elements, beginning with a series of spells: Wish Spell, Magic Burst Force Field, Electric Blast Orb, Wind‑Thunder Wings, Rainbow Light Cloak, Mirror Image, Tim Kainan Demon Sword Technique, Psychic Field, Mind Blast, Psychic Storm, Electric Light Ray, Anti‑Magic Field, Disintegrate, and so on, all of which had already been upgraded to the eighth ring.

Below Saint Rank, the maximum spell level one can master is the eighth ring.

To upgrade spells again, he'll have to wait until he becomes a Holy Soul Wizard.

There are also spells capped at the seventh ring or lower, such as Rainbow Light Ray, Advanced Thunderclap Technique, Silence, Mind Freeze, Space-Time Shock, Dispel Magic, Mage's Hand, and so on, which can no longer be upgraded.

Previously, after merging the demon soul of the Eye Demon Elder, he obtained over twenty spells, about half of which were various rays, most seldom used, yet they had also reached the ring cap.

Lei En browsed through them.

He then discovered he actually had sixty spells, accounting for more than half of all Elements. In sheer number, that matched the Law Seal School's Wizards, and even many Legendary High-rank Law Seal Wizards had fewer spells.

"Finally I look a bit like a wizard," he boasted.

Then he examined the other two categories of Elements.

Psychic Elements cannot be upgraded with energy, nothing to say. Physical Elements number nearly forty; because identical Physical Elements can stack, their count is slightly less than Arcane Elements.

Physical Elements generally lack ring caps like Arcane Elements; even with energy, they can't be instantly upgraded in a short time, leaving room for gradual improvement.

First is Strength.

This most vital foundational Element reached Level 15!

The progress bar beneath the Strength icon remains, but the upgrade button on its right has vanished. Lei En had seen this before; before ascending to Legendary, Strength had been stuck at Level 7. This shows that below Saint Rank, Strength tops out at Level 15.

Once he becomes a Holy Soul Wizard, Strength can continue to rise.

Titanic Divine Power is linked to Strength; the two Legendary Elements grow together, now at Level 4, and cannot be raised further.

Titanium‑Extreme Golden Body remains at Level 2.

The current progress bar reads 73%; the energy needed to reach Level 3 is excessive, over five thousand units!

The newly acquired Legendary Element "Energy Furnace" also rose to Level 2, boosting its absorbable energy damage by half compared to Level 1. In other words, he can endure the damage of three standard ninth‑ring single‑target spells without injury, converting that energy into his own Strength or using it to heal wounds.

Lei En sensed carefully for a while; the Energy Furnace's potential is enormous.

However, the energy required for its upgrade is frighteningly high, comparable to the Titanium‑Extreme Golden Body; its progress bar sits at 34%, still far from upgrading.

There are many other melee Elements, each raised by one or two levels.

Lei En's most frequently used melee Elements now are a few: Destructive Critical, Thunder Slash, War Stomp, Lightning Five‑Hit Combo, and Thunder God's Spear; others like Tear, Reverse Slash, Heavy Strike, Blade Storm, Strength Burst, etc., are seldom used, only upgraded casually.

What he values most is the "Main Brain Heart".

This Physical Element has been fed energy from the start without pause, consuming the most energy; this time it jumped two levels in one go!

A seventh‑level Main Brain Heart can create 512 Brain Fragment Crystals.

At Level 8, the quantity doubles.

Previously, Lei En thought that a Level‑8 Main Brain Heart's fragments could lift the restriction of only copying Elements below Legendary, but the result was unexpected: aside from the doubled count, nothing else changed.

Only at Level 9 can the Main Brain Heart's fragments inherit Elements beyond Legendary.

Yet they can only copy Elements from the early Legendary stage.

"It's really hard!" Lei En sighed.

To know, the Main Brain Heart consumed over 2,500 energy units moving from Level 7 to 8. Jumping to Level 9 then tripled the requirement to over 7,500 units, exceeding the consumption of the Titanium‑Extreme Golden Body.

The price of a double‑level jump is ten thousand energy units.

Lei En glanced at the Main Brain Heart's progress bar and saw it could still upgrade!

But after a brief test, he found that reaching Level 10 would require nearly thirty thousand units, far beyond imagination. Without the MutatedPhone, perhaps no one in this world could raise the Main Brain Heart that high; even Augulevi Master is only at Level 5.

Each two‑level rise of the Main Brain Heart lifts the Element cap of its fragments by one tier.

According to this rule, when the Main Brain Heart reaches Level 11, Thundercast Celestial Soldiers can inherit his mid‑Legendary Elements.

Lei En couldn't help shaking his head; this is almost an impossible task.

"It seems Thundercast Celestial Soldiers can only reach early Legendary," he muttered, recalling the three demon souls he fused at early Legendary: 'Bimon Beast', 'Mysterious Touch', and 'Magic Fairy Spirit'—few Elements, yet they contain two Legendary Elements!

If each Thundercast Celestial Soldier could create a Mysterious duplicate, the number of duplicates would double outright!

And Wish Spell!

Lei En's eyes lit up at the thought.

But on second thought, it's unlikely; creating a Mysterious duplicate requires a corpse of Mysterious Touch, mere Elements aren't enough.

"Let's give it a try."

He instantly opened a random door leading to the adjacent Mechanical Alchemy Room; a Thundercast Celestial Soldier walked over, removed its helmet, and stood motionless before him.

The ninth-level Primary Brain Heart can create 2048 brain fragment crystals.

Previously created brain fragments need not be recreated; simply copying the elements from the main brain suffices, like a computer system upgrade.

Lei En's thought flickered, and the leaf of the Primary Brain Heart on the World Tree shimmered, illuminating the soul space.

On the fourth layer of the World Tree, the three branches formed from magic souls resonated at a distance.

The leaves on the three branches trembled together, the energy dropped, consuming about thirty units to copy these elements, forming a small cluster of light.

Lei En immediately sensed the anomaly.

The element copying for the other two magic souls proceeded smoothly, but the Magic Fairy Spirit did not.

The Magic Fairy Spirit's magic soul has only four elements: "Flash", "Magic Burst Force Field", "Constant Flight Technique", and "Wish Spell". The first three have been copied, but the Wish Spell merely flickered and then calmed.

This is exactly the same as when Oxi Liya tried to share the Wish Spell via a soul contract.

"As expected, it doesn't work…"

Lei En felt very helpless.

The Wish Spell was gifted to him by the God of Magic, titled "King of All Laws", and likely has a mysterious link to the deity's office, containing the ultimate truth of magic.

The God of Magic's gift truly is extraordinary.

Lei En tried several more times and found it still wouldn't work, so he gave up.

He pressed his index finger to the forehead of the Thundercast Celestial Soldier; the cluster of light bearing a dozen elements left the soul space and merged into the soldier's forehead.

At once, the Thundercast Celestial Soldier's whole body trembled slightly, entering a Soul Transformation.

A few minutes later, the Soul Transformation was complete.

This Thundercast Celestial Soldier advanced to Legendary!

Lei En simultaneously sensed the clone's status via the brain fragment crystals and observed with his Soul Eye. The Legendary Low-rank Thundercast Celestial Soldier's most notable boost is strength reaching level ten, an effect of stacking the power elements of the Bimon Beast's magic soul.

Its iron body remains at level three, and the progress bar advanced by a small half.

The Bimon Beast also adds aerial leap, shockwave, piercing roar, Bimon claws, berserk, and self‑healing physical elements, making the Thundercast Celestial Soldier's melee power stronger.

As for the Mystic Touch's magic soul, as previously guessed, it cannot create a clone.

Without a clone, castling and miracle resurrection are useless; only "Advanced Nightmare Art", "Spiritual Vision", and "Delusion Technique" remain as the three Arcane Elements.

The Magic Fairy Spirit's magic soul is even worse.

It has only four elements in total; the Wish Spell is lost, Flash is already mastered, and it only obtained "Constant Flight Technique" and "Magic Burst Force Field".

Although there is some regret, Lei En is satisfied.

The greatest gain from the Thundercast Celestial Soldier's Legendary advancement is not these elements, but that after their Soul Transformation they can wield higher spells. Every Thundercast Celestial Soldier is a mage; high‑rank mages can only master Four‑ring Spells, while Legendary mages' spells can reach Six‑ring.

The power gap between Four‑ring and Six‑ring spells is as vast as heaven and earth!

Even if the Thundercast Celestial Soldiers remain forever at Legendary Low-rank, the legion formed by countless of them would still shake the world.

It should be noted that the Thundercast Celestial Soldiers were originally intended merely as tools.

Hundreds of Legendary mages, possibly reaching thousands in the future; with so many Legendary mages as tools, can anything be more extravagant?

Lei En glanced at the Soul Power Pool.

Upgrading one Thundercast Celestial Soldier requires thirty units of energy; even a full Soul Power Pool cannot upgrade the current hundred‑plus soldiers to Legendary.

"It's a bit insufficient."

"We can't just upgrade the Thundercast Celestial Soldiers; the Primary Brain Heart is at ninth level, able to create 2048 brain fragment crystals, plenty in number, allowing more Thundercast Celestial Soldiers. Once the powered armor research is complete, the crystal‑controlled Titan engine will be sufficient to equip all Extreme Warriors with powered armor, with surplus."

"The Electric Light Cannon can be made at will now."

"The number of Thundercast Celestial Soldiers can increase severalfold; five or six hundred is no problem, and even they can be fitted with powered armor."

"Other envisioned vehicles and weapons can also be controlled by brain fragment crystals."

"The twelve Mage Clones in the Obsidian Tower have all reached High‑rank pinnacle; once they successfully build a Five‑ring Spell Model, they can break through to Legendary. But having only rank is useless; the Mage Clones must master enough spells, each Spell Model consumes energy, then they continue upgrading."

"All of this requires energy!"

Lei En calculated in his mind, recalling the energy wasted outside Eternal Song City, and felt a toothache.

The Soul Power Pool's capacity is simply insufficient, like painstakingly opening a door to a bank vault only to find you've brought a torn sack, making one want to cry without tears.

Now the battle is over; where to harvest so much energy?

Expanding the Soul Power Pool is the top priority!

The only solution is to advance to a Holy Soul Wizard.

Lei En checked his rank; he is still a seventeenth‑level Wizard, and by casually investing two hundred units of energy he can rise to nineteenth level and easily reach the peak.

But there is no suitable magic soul.

He couldn't help but think, perhaps just fuse two Legendary High‑rank magic souls.

Anyway, his strength already surpasses Legendary, akin to a Saint Rank powerhouse. Even fusing two mismatched magic souls wouldn't affect his power much; perfection is unnecessary.

The earlier one becomes a Holy Soul Wizard, the more benefits accrue.

Lei En made up his mind and allocated the energy in the Soul Power Pool.

First, he used up 1,500 units, upgrading fifty Thundercast Celestial Soldiers to Legendary; 1,000 units of energy went to the twelve Mage Clones for building Spell Models to break them to Legendary; the remaining energy was kept in reserve to create brain fragment crystals for developing various weaponry.

One by one, the Thundercast Celestial Soldiers were teleported into the meditation chamber, where Lei En upgraded them, triggering Soul Transformations.

When night fell, fifty Thundercast Celestial Soldiers had become Legendary.

The Mage Clones in the Obsidian Tower also easily built Five‑ring Spells, entered Soul Transformations, and advanced to Legendary mages.

In the blink of an eye, the Soul Power Pool was down to only a few hundred units of energy.

Lei En sighed.

Then he dispatched a portion of the newly upgraded Thundercast Celestial Soldiers to Shield Island, crossing Getan's city walls into the strait opposite Aibolaken, spreading out in groups of five to sweep away all encountered undead and evil entities, continuously harvesting their souls.

At that moment, Lei En sensed the movement of three brain fragment crystals and looked toward the New Continent.

Naxas Fu Kong Cheng has returned to the Prime Material Plane!

(End of Chapter)