Caesar remained within the depths of his laboratory, a space that seemed less like a room and more like a living system of intellect and machinery intertwined. Holographic interfaces floated around him in layered clusters, streams of data flowing continuously as countless automated constructs assembled the device that would soon determine the fate of the missing students. The air hummed faintly with energy, punctuated by the occasional pulse of light from half-formed mechanisms snapping into place.
Several meters away, Yuki stood in quiet contrast to the controlled chaos. A dagger of ice spun idly between her fingers, conjured and dismissed in a slow, absent rhythm. She knew better than to interrupt him when he was like this, fully immersed, mind racing beyond ordinary comprehension, yet the tension in the room was palpable, and even she could not entirely ignore it.
Caesar's eyes scanned the data embedded within the USB once more, his expression tightening as he processed its implications. A low hiss escaped him, his teeth grinding briefly.
Yuki glanced over, her olive skin catching the sterile light of the lab as she tilted her head slightly.
"What's wrong?" she asked.
Caesar did not answer immediately. He dismissed one set of holograms only to bring forth another, layering projections over projections as he refined his calculations. Finally, he spoke, his tone measured but edged with concern.
"The atum within that realm… it's stagnant," he said. "An impossible state, at least, it should be. But if this data is accurate, then our connection to our planes will be heavily suppressed… possibly severed entirely."
Yuki's brow furrowed as she stepped forward slightly.
"What does that mean for us?"
Caesar exhaled slowly, his gaze still fixed on the shifting data.
"It means your abilities will be limited," he said. "Severely. Most of what you rely on, your manipulation of atum, will be weakened or rendered unusable."
He paused briefly before adding, almost matter-of-factly:
"Mine won't be."
That drew her full attention.
"What do you mean?" she asked, her tone sharpening. "You shouldn't be on the front line."
At that, Caesar finally turned to face her fully. Without a word, he raised his arm, and then, in a fluid mechanical motion, it deconstructed.
Panels slid apart seamlessly, revealing not flesh, not muscle, but intricate machinery beneath. Gears, conduits, and streams of glowing azure energy pulsed through the structure, feeding into a single exposed bone at the core. There was nothing human left in that limb, nothing except the memory of what it had once been.
Yuki's expression shifted, something uneasy settling behind her eyes.
"Yuki… look at me," Caesar said quietly.
His torso opened next.
Layers parted, revealing the only organic component that remained, a single beating heart, suspended within a framework of metal and light. It pulsed steadily, almost defiantly, surrounded by the cold precision of the machine that had replaced everything else.
"I am a machine," he continued, his voice steady, devoid of self-pity. "That is the price I paid to advance within my plane. My enigma demands sacrifice, significant sacrifice, but in return, it grants knowledge. Power. The ability to create and protect."
He closed his body again, the mechanical layers sealing seamlessly until he appeared whole once more.
"I am as capable on the front lines as any of you," he said. "Perhaps more so, given the circumstances. I will deploy my machines alongside us, but make no mistake, if something appears that threatens this mission, I will be the one to confront it."
Yuki studied him in silence for a moment, then exhaled softly.
"You're saying there are still spawn in that realm?" she asked.
Caesar nodded.
"Yes. And not just the lesser kinds."
That was enough for her. She dismissed her dagger and gave a small, reluctant nod.
At that moment, the reinforced doors of the laboratory slid open with a low hiss.
Three figures entered.
Two of them were immediately recognizable, Callum, clad in radiant armor with his usual confident demeanor, and beside him a woman whose presence carried both elegance and weight. Artoria, her golden hair and eyes gleaming faintly even in the sterile light, moved with the quiet authority of someone who needed no introduction.
Between them walked a third figure.
Evelyn.
Her abyssal hair seemed to consume the light around it, her shadow moving subtly, independently, as though it possessed its own awareness. Her ivory skin contrasted sharply with the darkness that followed her, and her calm, observant gaze swept across the laboratory with quiet curiosity.
Caesar's eyes narrowed slightly as Callum stepped forward with a grin.
"Heh… missed us?" he said casually.
Caesar let out a brief chuckle, stepping through layers of holograms as his machines finalized the construction of the teleportation device behind him.
"You took your time," he replied.
They clasped hands briefly, a gesture of mutual acknowledgment rather than formality. Caesar's gaze moved across the group, analyzing them instinctively. Their reserves of harmonic atum were sufficient, barely. Without that baseline, entering the realm would have meant immediate death.
Satisfied, he gestured for them to gather.
"Alright," he began, his tone shifting into one of focused authority. "Let me explain what I've discovered."
The group assembled around him, Yuki moving to perch on a railing behind them, her attention fully engaged.
"The realm we're entering is saturated with stagnant atum," Caesar continued. "That means our connection to our respective planes will be suppressed, possibly severed entirely. However, your bodies have been reinforced through trials. Even without your abilities, each of you possesses enough raw physical strength to demolish a mountain if necessary."
He paused, letting that settle before continuing.
"The real problem is what resides within that realm."
The holograms shifted, displaying distorted data patterns.
"There are spawn present, stronger ones. Based on what I've analyzed, we may encounter entities at or beyond the fifth stage. Possibly even the sixth stage."
The room grew noticeably quieter.
"If we encounter anything at the sixth stage or higher," Caesar said firmly, "we do not engage. We run."
His gaze hardened slightly.
"That is not a suggestion."
He continued without pause.
"I cannot set precise coordinates. The realm exists outside any mapped structure, so our point of arrival will be random. Additionally, this is a one-way journey. Once we enter, we cannot return using this device. We will need to find an exit from within the realm itself."
He hesitated for just a fraction of a second, something unspoken lingering in his expression, but then he moved on.
Each of them was handed a weapon.
Not ordinary weapons, but cybernetic constructs, engineered to function independently of harmonic atum.
Callum and Artoria each received blades, sleek and balanced for direct combat. Yuki was given a spear, its structure designed for both offense and control. Evelyn received a bow, its form elegant yet unnervingly precise.
Caesar himself carried nothing.
He did not need to.
After gathering a compact version of his laboratory systems and securing Hachi in a reduced form within his coat, he moved to the central console and began inputting the final sequence.
Behind him, the others gathered within the core of the chamber.
Artoria glanced around, her gaze taking in the machinery with quiet curiosity.
"Are all laboratories of this era this advanced?" she asked.
Caesar didn't look up.
"No," he replied, pressing another key as a pulse of blue energy surged through the room. "Just this one."
A brief pause.
"I am the brightest mind of this era."
The chamber sealed completely, isolating them from the outside world.
"Put on the devices I gave you," Caesar instructed.
Each of them activated the small, diamond-shaped constructs. Instantly, a hexagonal barrier formed around their bodies, a protective layer designed to compensate for the realm's hostile conditions.
As the chamber began to charge, energy building in waves around them, Caesar spoke again, his voice cutting through the rising hum.
"Everyone, take hold of each other."
They complied, forming a connected chain.
"That will ensure we arrive at the same location."
The energy intensified, the air itself beginning to distort.
"Our objective is simple," Caesar continued. "Retrieve the students and return. Avoid unnecessary combat. If we encounter high-level threats, we evade."
He paused, his gaze sweeping across each of them.
"But if we are forced to fight… then we fight to win."
The chamber trembled as the energy reached its peak.
"Because if we fail,"
The light surged violently.
"The students die."
And with that, the energy erupted, swallowing them entirely as they were torn from their world and cast into the unknown.