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Fortunately, the Lion King Agency wasn't involved in this matter. Otherwise, given my methods, the Agency might have simply vanished.

Thinking of this, Yukina Himeragi, Sayaka Kirasaka, and the other girls exchanged glances, finally breathing a collective sigh of relief.

However, just then, Itogami Island suddenly began to tremble violently.

An aura, rapidly intensifying from the deep sea, caused everyone's expressions to change drastically.

Even I couldn't help but glance over repeatedly. After all, this aura surpassed even that of the Lost Warlord. It truly puzzled me.

'Could it be the Leviathan awakened by the Bureau of Astrology?!'

Realizing this, I didn't hesitate. I directly eliminated all the attackers present, then instructed the girls.

"It's probably the Leviathan waking up. I have to go deal with it. You all stay safe in the castle. No one can get in."

"Okay! Be careful!"

Hearing my words, the girls all nodded with worried expressions.

After the girls returned to the castle, I gave a cold glance towards the direction of the Bureau of Astrology, then vanished on the spot.

——

"R-Report!"

"A massive Bio-energy signature has appeared east of Itogami Island!!"

"It's heading towards us!!!"

"..."

The Itogami Island fleet, originally on patrol, fell into disarray upon detecting the mysterious creature.

The Fleet captain's pupils constricted. He immediately pushed aside the detector operator and sat down in front of the screen himself.

A few moments later, his expression turned to extreme panic and horror.

Because according to the device's readings, the mysterious creature's energy reaction was ridiculously high—something he had never seen before.

Even more terrifying was that the creature's size exceeded the radar's detection range.

Although he didn't know what it was, judging by its reckless, astonishing speed towards the fleet and Itogami Island, it definitely wasn't anything good!

——

The next moment, everyone on the entire fleet showed expressions of fear, their eyes filled with despair.

In the distance, a tsunami nearly 10,000-meter-high wave was rushing towards the fleet and Itogami Island behind them at a visible speed.

They were completely unable to evade it. They could only close their eyes in despair, awaiting the arrival of death!!!

However, after a long while, the tsunami still hadn't arrived. Everyone was filled with doubt and uncertainty.

"Hey, don't just stand there like idiots! If you don't want to die, get away from here quickly!"

In the deathly silence, a Young man's voice faintly reached everyone's ears.

Hearing the voice, everyone, including the captain, abruptly opened their eyes.

When they saw the scene before them, everyone's mouths gaped open, their eyes fixed firmly ahead.

The monstrous 10,000-meter wave appeared frozen in place. Looking closer, they saw the previously world-ending tsunami was now encased in ice.

Looking at this breathtaking scene, everyone couldn't help but gulp!

"Are you leaving or not? That thing is about to arrive! You might get hurt when the fight starts!"

Hearing the voice again, the captain quickly turned his neck and looked up.

The other crew members did the same.

——

High above, Kyoya looked down at them with an exasperated expression, urging them to leave.

Seeing this, the captain expressed his gratitude, then ordered an immediate retreat!

The other crew members also looked at me with excitement, their faces moved.

They had thought they were doomed to perish at the bottom of the sea, their hearts already filled with despair.

However, they hadn't expected my arrival to rescue them from the brink, giving them hope to live.

———

After the fleet left, I turned my gaze towards the frozen ice. I could feel the Leviathan was about to appear.

A long while later, a deep, terrifying roar echoed, and the entire sea surface began to shake violently.

A few seconds later, the 10,000 meter iceberg instantly collapsed. Following that, an incomparably massive figure appeared, its body covered in various weapons.

This was the strongest biological weapon from the Age of Mythology—the Demon Beast Leviathan. Over 4,000 meters long—its entire body was covered by a magic barrier. It was equipped with countless magic cannons and possessed numerous powerful armaments such as biological torpedoes and anti-ship missiles.

It was practically a walking arsenal, albeit a living one, and easily provoked.

Originally, this Demon Beast Leviathan had slumbered peacefully at the bottom of the sea for millennia. As long as one didn't approach the Leviathan drifting near the Dragon Veins, they wouldn't be harmed.

However, the Bureau of Astrology, in order to destroy Itogami Island and kill Asagi Aiba, deliberately angered the Leviathan, seeking to use its power to achieve their goals.

A fierce killing intent flashed in my eyes as I muttered to myself.

"After I deal with the Leviathan, I'll go wipe out the Bureau of Astrology and the other annoying ants."

Finished speaking, I looked at the Demon Beast Leviathan, known as the strongest biological weapon, and couldn't help but marvel.

"It truly deserves the title of 'Strongest Weapon.' Just its sheer size alone would be enough to fill anyone with despair!"

Back when I slaughtered Yamata no Orochi, the Susanoo I manifested at full Power was barely 1,000 meters tall!

Yet, this Demon Beast Leviathan's size reached a terrifying 4,000 meters. Truly shocking.

But I wasn't afraid!

——

The next second, I directly activated my [Rinnegan] and summoned [Susanoo], planning to test myself against this strongest biological weapon.

With my current abundant magic power level, the Susanoo summoned at full strength could even reach 10,000 meters. However, I didn't do that, instead condensing it to the same size as the Leviathan.

I activated the [Complete Body - Susanoo], my eyes firmly fixed on the Leviathan ahead. It had clearly noticed me as well.

Immediately, I controlled the giant sword in Susanoo's hand, enchanting it with lightning, and swung forcefully towards the Leviathan. A massive slash surged forward.

An enormous slash, carrying countless crackling purple lightning bolts, surged towards Leviathan, constantly eroding its defenses.

Sensing the threat of death, the magic cannons on the Leviathan's body instantly activated and finished charging. At the same time, it spewed a terrifying beam of destructive light from its mouth.

A few seconds later, the Leviathan's light cannon collided with Susanoo's slash.

The next moment, a dazzling light flashed, and the two energies instantly intertwined, spreading wantonly across the sea, nearly extinguishing all surrounding life.

BOOOOOOOOOOOOOMMMMM!!!!

A series of massive explosions echoed, even reaching the entire Itogami Island, causing fear among its inhabitants.

When the vast steam dissipated, the originally imposing Leviathan now had multiple cracks on its body, parts of it blackened like charcoal.

With just a single strike, the Leviathan, proclaimed as the strongest biological weapon, was now riddled with wounds.

Leviathan roared in pain, and then—surprisingly—the injuries on its body began to slowly heal.

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