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Chapter 6 - Chapter 6: When Concepts Collide ~ Rimuru vs Accelerator

The cosmic arena underwent its most dramatic transformation yet, reality itself seeming to hold its breath as two figures stepped forward from the remaining spectators. The very air crackled with opposing forces—conceptual manipulation meeting absolute physical law, infinite adaptation confronting perfect reflection.

Rimuru Tempest walked calmly toward the center, their humanoid form deceptively casual despite the overwhelming presence they emanated. Blue hair swayed gently in the dimensional winds, golden eyes gleaming with an intelligence that transcended mortal comprehension. Around them, space itself seemed to bend subtly, as if reality recognized the presence of something that existed beyond conventional physics.

Across the arena, Accelerator moved with measured steps, his pale hair catching the ethereal light. The white-haired esper's red eyes held a calculating coldness, while his modified choker hummed with the constant data flow from the Misaka Network. An almost imperceptible barrier surrounded him—the manifestation of his vector control creating a zone where the laws of physics bent to his absolute will.

"Interesting," Rimuru mused, their voice carrying harmonics that seemed to resonate across multiple dimensions. "You're not entirely human anymore, are you?"

Accelerator's lips curved into a sardonic smile. "Says the slime who became a god. Though I suppose we're both pretty far from what we started as."

The mysterious organizer's voice echoed through the arena, carrying an undertone of fascination. "The concept of absolute adaptation meets the law of perfect reflection. Two forms of invincibility that should theoretically be impossible to overcome. Begin when you're ready."

Neither fighter moved immediately. Both were analytical by nature, their enhanced minds already working through countless scenarios and possibilities. The silence stretched until Rimuru took the initiative.

"Shall we test the waters?" they asked, extending a hand. A simple magic bullet materialized, crackling with concentrated energy. "Let's see how your reflection handles this."

The projectile flew toward Accelerator at moderate speed—a testing shot rather than a serious attack. The moment it touched his barrier, it reversed direction perfectly, heading back toward Rimuru with identical velocity.

Rimuru caught the returned projectile with casual ease, their expression thoughtful. "Automatic reflection. Impressive. But what about this?"

This time, multiple projectiles launched simultaneously—dozens of magic bullets approaching from different angles, each carrying different properties. Fire, ice, lightning, darkness, light—a rainbow of magical energies converging on Accelerator's position.

Every single projectile rebounded perfectly, creating a light show as they returned to their origin. Accelerator didn't even flinch, his barrier operating with mechanical precision.

"My turn," Accelerator said, stomping his foot. The ground beneath Rimuru exploded upward, chunks of the arena's enhanced material flying at velocities that would have pulverized mountains.

Rimuru's form shimmered, and the debris passed through them harmlessly. "Spatial manipulation," they explained conversationally. "I can exist in multiple dimensional layers simultaneously. Physical attacks in a single dimension can't touch me."

"Cute," Accelerator replied, his grin widening. "But vectors exist in all dimensions."

He raised his hand, and suddenly Rimuru felt it—an invisible force trying to grip every particle of their being simultaneously. Accelerator was attempting to manipulate the vectors of Rimuru's very existence across dimensional barriers.

For a moment, Rimuru's form flickered, caught between dimensions. Then they stabilized, their expression genuinely impressed. "You can reach across dimensional boundaries. That's... actually challenging."

"I can manipulate any vector I can calculate," Accelerator explained, his red eyes gleaming. "And thanks to the Misaka Network, my calculation power is effectively unlimited. Dimension, space, time—they're all just mathematical concepts to me."

Rimuru nodded approvingly. "Then let me show you something interesting. Void God Azathoth."

The change was immediate and terrifying. Reality around Rimuru began to warp, not bending but actually ceasing to exist in conventional terms. Spacetime Domination activated, creating a Multidimensional Barrier that existed in a state of conceptual nothingness.

Accelerator's reflection ability suddenly found itself facing an existential crisis. How do you reflect something that doesn't exist? How do you calculate vectors for forces that operate outside the framework of physics entirely?

"Impossible," Accelerator muttered, his enhanced mind struggling to process what he was witnessing. "There's no vector to manipulate. You're not using force, you're using... nothing."

"Exactly," Rimuru replied, their voice echoing from everywhere and nowhere. "Void manipulation exists in the absence of physics. There are no vectors to reflect because there's no force being applied. I'm not attacking you—I'm simply removing the concept of your existence from reality."

The arena around them began to dissolve, not destroyed but simply ceasing to be. Accelerator felt his reflection ability failing for the first time since he'd awakened it. His choker sparked as the Misaka Network worked overtime, trying to calculate a defense against something that had no mathematical foundation.

"Awakening," Accelerator growled, and pale platinum wings erupted from his back. In his latest awakening, Accelerator manifested pale platinum wings, comparable to those of Aiwass - a being of the Aeon of Horus, having attained such a status by crossing the Clonoth's equivalent of the Abyss.

The change was immediate. Where before Accelerator had been bound by physical laws, now he operated on a higher conceptual level. His vector manipulation expanded beyond mere physics into the realm of abstract concepts. If Rimuru could manipulate void, then Accelerator would manipulate the vectors of existence itself.

"Impressive," Rimuru acknowledged as reality reasserted itself around them. "You've transcended your original limitations. But can you handle this?"

Rimuru's form began to shift, not physically but conceptually. They became the embodiment of infinite possibility, their being expanding across all potential states simultaneously. Through Azathoth's power, they existed as every possible version of themselves at once.

Accelerator's platinum wings flared as he met the challenge. His awakened state allowed him to perceive and manipulate vectors that existed beyond normal physics. Where Rimuru became infinite possibility, Accelerator became infinite calculation—his mind processing every potential vector across all possible states.

The battle that followed defied description. It wasn't fought with attacks or defenses in any conventional sense. Instead, it was a clash of fundamental concepts—void manipulation versus vector control, infinite adaptation versus perfect reflection, conceptual existence versus mathematical absolute.

Reality fractured around them as two incompatible forms of invincibility met head-on. Rimuru would cease to exist, only to immediately adapt and find a new form of existence that bypassed Accelerator's defenses. Accelerator would perfectly reflect any force applied to him, only to find that Rimuru's next approach operated outside the framework of force entirely.

The other fighters watched in fascination and horror as the arena itself began to break down. This wasn't destruction—it was the fundamental inability of reality to contain two absolute concepts simultaneously.

"This could go on forever," Goku observed, his Ultra Instinct flickering as he tried to follow the battle. "They're both operating on levels that transcend normal combat."

"Not forever," Saitama corrected, his tone unusually serious. "Look closer."

Indeed, despite the cosmic scale of their conflict, subtle changes were occurring. Accelerator's choker was beginning to spark more frequently, the strain of calculating infinite possibilities pushing even his enhanced cognitive abilities to their limits. His platinum wings flickered occasionally, signs that maintaining his awakened state was taking its toll.

Rimuru, meanwhile, showed no signs of fatigue. If anything, they seemed to be growing stronger, their conceptual manipulation becoming more refined with each exchange. The key difference was becoming apparent—Accelerator's power, however vast, was still ultimately finite. His calculations, while incredibly advanced, still required processing time and energy.

Rimuru's adaptation was truly infinite. Each time Accelerator found a way to reflect or counter their attacks, Rimuru simply evolved beyond that limitation. They weren't bound by energy constraints or processing limitations—they were a concept that had achieved physical form.

"You're strong," Rimuru admitted as they paused the reality-warping exchange. "Stronger than I expected. But you're still operating within a framework, even if it's an incredibly advanced one."

Accelerator's breathing was becoming labored, his choker sparking more frequently. "And you're not operating within any framework at all. You're just... rewriting the rules as you go."

"Exactly," Rimuru confirmed. "That's the nature of conceptual existence. I don't fight against limitations—I simply transcend them. Your vector manipulation is perfect within its scope, but my adaptation has no scope."

As if to demonstrate, Rimuru's next attack bypassed every defensive concept simultaneously. It wasn't void manipulation, vector application, or dimensional shifting. It was simply the application of victory itself—the concept that they should win, made manifest in reality.

Accelerator's reflection ability, for all its perfection, couldn't reflect a concept. His vector manipulation couldn't redirect something that existed as pure idea rather than force. His awakened state allowed him to perceive what was happening, but not to counter it.

"I understand now," Accelerator said, his platinum wings beginning to fade as exhaustion set in. "Your power isn't just adaptation—it's conceptual supremacy. You don't just overcome obstacles, you redefine what obstacles can exist."

Rimuru nodded, their form stabilizing as the battle reached its conclusion. "Your abilities are remarkable, and in any physical or mathematical framework, they would be unbeatable. But concepts transcend frameworks."

Accelerator's awakening finally gave out, his wings dissipating as he dropped to one knee. His choker sparked one final time before stabilizing, his enhanced calculations confirming what he already knew—there was no vector-based solution to conceptual supremacy.

"You win," he admitted, his tone holding more curiosity than defeat. "Though I have to ask—is there anything that can beat concept manipulation?"

Rimuru's expression became thoughtful. "Perhaps. But we'll have to see if any of the remaining fighters operate on that level."

The arena began to repair itself as the organizer's voice echoed through the space. "Winner: Rimuru Tempest. The concept of adaptation proves superior to the law of reflection."

As the dust settled and reality reasserted its normal parameters, the implications of the battle became clear. Raw power, no matter how perfectly applied, couldn't overcome the fundamental nature of conceptual existence. The tournament had just eliminated one of its most analytically perfect fighters, not through superior strength, but through superior existence.

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Technical Analysis: Rimuru vs Accelerator

 Ability Framework Comparison

**Accelerator's Vector Manipulation:**

- Creates a thin field of AIM around him, which allows him to modify the vector values of anything he touches

- Acquired the presence, abilities and support of Qliphah Puzzle 545, and the support of the Clonoth "tree" that "aids" his vector manipulation

- In his latest awakening, Accelerator manifested pale platinum wings, comparable to those of Aiwass - a being of the Aeon of Horus

- Perfect reflection of any force with calculable vectors

- Enhanced by Misaka Network for unlimited computational power

**Rimuru's Void God Azathoth:**

- Spacetime Domination and Multidimensional Barrier capabilities

- Ciel prevents Rimuru's deep psyche from being interfered with, which blocks attempts to read their mind or memories even by beings such as True Dragons

- Conceptual existence transcending physical laws

- Infinite adaptation through conceptual manipulation

- Reality rewriting at fundamental levels

Critical Analysis Points

**Accelerator's Theoretical Invincibility:**

Perfect reflection creates an absolute defense against any force-based attack. His awakened state with platinum wings allows manipulation of vectors beyond physical laws, theoretically making him unbeatable through conventional means.

**Rimuru's Conceptual Supremacy:**

Operating as a concept rather than a physical entity, Rimuru transcends the framework within which vector manipulation functions. Void manipulation exists in the absence of physics, providing no vectors to reflect.

**The Framework Paradox:**

Accelerator's power, while perfect, operates within a mathematical framework. Rimuru's adaptation transcends frameworks entirely, creating an insurmountable logical gap.

### Decisive Factors

**Accelerator's Limitations:**

- Requires calculation even at enhanced levels

- Bound by mathematical frameworks, however advanced

- Awakening state has finite duration

- Vector manipulation requires vectors to exist

**Rimuru's Advantages:**

- Infinite adaptation with no energy constraints

- Conceptual existence bypasses physical laws

- No framework limitations

- Evolution beyond mathematical calculation

### Energy and Endurance Analysis

Accelerator's abilities, while incredibly advanced, require constant calculation and energy expenditure. His awakened state represents peak performance but cannot be maintained indefinitely. Rimuru's conceptual existence requires no energy maintenance and actually grows stronger through adaptation.

### Conclusion

While Accelerator's vector manipulation represents the pinnacle of physics-based invincibility, Rimuru's conceptual manipulation operates on a level that transcends physical laws entirely. The battle demonstrates that perfect mastery within a framework cannot overcome existence outside that framework.

Accelerator's reflection ability, mathematical precision, and awakened state make him virtually unbeatable against any force-based opponent. However, Rimuru's void manipulation and conceptual adaptation bypass the fundamental assumptions upon which vector control depends.

**Result: Rimuru wins through conceptual supremacy over mathematical perfection.**

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**Remaining fighters: 16**

Next battle preview: Speed meets shadows as Ichigo Kurosaki's divine cutting power faces Sung Jin-Woo's overwhelming Shadow Monarch army in a battle testing whether individual transcendence can overcome infinite numbers.

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