"Tch... what is with this filthy mud water?!"
Gilgamesh sat upon the throne of Vimana, his usually arrogant face now written with shock and anger.
In a mere instant, his vision was replaced by endless darkness.
This was no ordinary Bounded Field, nor was it some illusion.
He felt as though he had been thrown tens of thousands of meters into the depths of the ocean.
Terrifying pressure crushed in from all directions, causing Vimana's golden hull to creak under the strain.
The radiant ship, which had been operating at full power and capable of supersonic flight, now felt as if it were bogged down in thick cement, unable to move a single inch.
Even more infuriating was the omnipresent sense of suffocation surrounding him.
This sea was a stagnant expanse formed from high-density magical energy, overflowing with Berserker's frenzied will.
As long as one remained within this domain, the circulation of magical energy within their body would be forcibly suppressed, much like the oxygen being slowly squeezed out of a drowning man's lungs.
And at the center of this domain...
A massive whirlpool generated an irresistible centripetal pull, continuously attempting to drag Gilgamesh into the deepest depths of the waters.
"Damned mongrel... to think you would dare defile my body with such filth!"
Gilgamesh tried to call upon the Gate of Babylon, only to find that the golden ripples opened at an agonizingly slow pace.
Many lower-ranked Noble Phantasms were even shoved right back in the moment they peeked out, completely suppressed by the terrifying water pressure!
Even so, dozens of Noble Phantasms gleaming with cold light shot forth.
However, those holy swords capable of cleaving mountains and divine spears able to pierce battleships suffered a drastic drop in speed the moment they entered the black water!
Their originally straight trajectories were forcibly twisted by the whirlpool's centripetal force. They were even squeezed until cracks formed under the terrifying water pressure, before being swept into the center of the deep sea and vanishing without a trace.
"Is this what you rely on? Is this Reality Marble the trump card of a mad dog like you?!"
A spine-chilling laughter echoed from the dark depths of the sea.
Gilgamesh whipped his head around.
Deep within the pitch-black waters, Berserker's figure surfaced like a phantom.
Unlike the struggling Gilgamesh, the Soul Reaper was the absolute ruler here.
The trident in his hand created an invisible vacuum zone around him, leaving him completely unaffected by the water pressure and suffocation.
At the same time, he could swing his weapon to let the currents drag him to any position, just like a drop of water blending into the black sea itself.
"Insolence!" Gilgamesh swung his hand back, and several defensive beams shot out from both sides of Vimana.
But Berserker merely made a slight turn in the water, completely vanishing from Gilgamesh's line of sight.
In the next second, he appeared directly beneath Vimana!
Berserker swung his trident.
Boom!
The heavy black water surrounding them instantly obeyed his command, transforming into countless high-pressure water blades that converged on Vimana from all directions to tear it apart!
Even the ancient ship of light rocked violently under this impact, and several shocking cracks instantly appeared on its golden hull.
"Ridiculous!"
Gilgamesh stood up from his throne and summoned a longsword radiating an aura of extreme cold—the legendary Demonic Sword of Ice from Norse mythology.
"Freeze for me!!" he roared.
Freezing magical energy erupted, attempting to turn this suffocating sea into a frozen world.
However, the azure frost only spread a few dozen meters before being instantly shattered by the frantically spinning vortex.
Within the Mumyo Deep Sea, all rules that did not belong to Berserker were rejected.
Every drop of water here was an extension of Berserker's will. Although the King of Heroes' Noble Phantasm was exquisite, it could not completely freeze his will.
Because the one dominating this will right now was a greedy and evil Hollow, and subduing him would not be so easy.
Berserker reached out his hand and suddenly clenched his fingers in the void, commanding, "Great Vortex!"
At this moment, Gilgamesh suddenly felt the surrounding seawater become even heavier.
The opponent was planning to drag him, along with Vimana, toward the singularity at the very center.
That was the place with the highest density in this sea, enough to destroy his spiritual core.
"Relying on a mere Noble Phantasm... to think you dare push me to such an extent!"
Gilgamesh was truly furious.
This drowning sense of powerlessness, this humiliation of being suppressed by a lowly creature, ignited his ultimate wrath as a king.
'I was merely playing around without getting serious, yet you dare act so arrogantly!'
A strangely shaped key appeared in his hand, and he slowly reached it into the depths of the void.
As the key turned, red patterns spread across the void.
This time, the ripples behind him were no longer golden, but had turned into a deep, dark red.
A vibration capable of making spacetime itself tremble emanated from his palm.
"I take back my previous words. To be able to die by this sword, you are no simple mongrel."
"Let this strike serve as the ceremony of our parting."
"I shall speak of the beginning. Heaven and earth are divided—"
Within the red light behind him, three cylindrical blade segments began to slowly rotate, whipping up a frenzied red storm within the black water!
The battle in the sky had already entered a clash of the mythological realm.
Meanwhile, the situation on the ground was also hurtling toward another kind of out-of-control direction.
Mion River, riverbank.
Just as everyone's attention was drawn to the black sphere in the sky, the originally calm surface of the river suddenly began to boil.
Glug, glug...
Countless massive bubbles surged up from the riverbed, carrying a strong, foul stench of fish and blood.
"What is that?"
Artoria, the only Servant still remaining on the riverbank, pulled her gaze back from the sky and looked warily at the river's surface.
In the next second, a scene that would cause one's sanity to plummet unfolded.
Splash!
A massive, slimy lump of flesh covered in tentacles emerged from the river water.
Following closely behind was a second, then a third...
Countless monsters of various forms—extremely twisted and defying all biological common sense—surged onto the riverbank like a tide, and their numbers were only increasing!
Some had the heads of fish and the bodies of humans, some looked like walking masses of rotting flesh, and others were giant starfish covered in compound eyes.
They let out bizarre cries laced with intense mental pollution, causing anyone who heard them to feel dizzy and on the verge of vomiting.
"Where... where did these monsters come from?!"
Even the King of Knights, who was accustomed to seeing mountains of corpses and seas of blood on the battlefield, could not help but furrow her brow at the sight of these indescribable Deep Sea Familiars.
At this time, Francesca and her other self had quietly drifted down to the high point of the bridge.
She casually killed the Assassin clone and gently rested both hands on Sola-Ui's shoulders.
Beside her, François was elegantly flipping through the human-skin book in his hands, a crazed smile on his face.
"Come out! Revel to your heart's content! My lovely children!"
"Let this city become a sacrifice offered to the abyss!"
His Noble Phantasm had been fully deployed.
Through that human-skin book, François connected to the deep sea of another dimension.
Those Cthulhu Spawn, which only existed in mad fantasies, were forcibly dragged into this world by him.