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Jujutsu Kaisen: What if.? MEGUMI FUSHIGURO PRIME: THE SHADOW SOVEREIGN

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Synopsis
The potential of the Ten Shadows Technique was never limited to just summoning. It was about creating a God within the Void. This is not the ordinary Megumi Fushiguro. This is Prime Megumi—the "Shadow Sovereign." He has evolved beyond a Special Grade Sorcerer, turning his body into "Liquid Shadow" and his mind into a tactical fortress. But his true terror lies hidden... locked within his Domain. Outside, he is a genius strategist. But once he expands his Domain, Chimera Shadow Garden, the rules of reality break. Inside this indestructible "Absolute Void Shell," the 10 Shadows do not fight alone—they become one. The Fusion Beast Prime. A forbidden entity created by fusing all 10 Shikigami—combining Mahoraga's infinite adaptation with Agito's regeneration. This "God Beast" cannot exist in the real world; it can only descend within the Domain. When the barrier closes, there is no escape. "Outside, I am a Sorcerer. Inside... I am the Creator."
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Chapter 1 - JJK: THE SHADOW SOVEREIGN – PRIME ASCENSION

MEGUMI FUSHIGURO [PRIME STATE]

1. 🧬 GENERAL STATUS

Name: Megumi Fushiguro — A Special Grade Sorcerer whose potential level is considered even higher than traditional Special Grade.

Title: The Shadow Sovereign (Kage no Shihaisha) — The Sovereign of Shadows, an unofficial name used in high-level reports.

Innate Technique: Ten Shadows Technique — Fully mastered.

Current State: Awakened – Prime State.

Megumi's development has taken a different path from traditional sorcerers. She treats shadows as terrain rather than merely increasing raw power, controls her technique like a structure, and uses shikigami as modular components of a tactical strategy. Unlike normal Sorcerers, Megumi is considered a manifestation of "Unorthodox Evolution," where system-level control has emerged as her greatest ability.

2. ⛩️ DOMAIN EXPANSION — Chimera Shadow Garden

Ryōiki Tenkai: Kangō An'ei Teien — Shin (鏡合暗影庭園・神)

Chimera Shadow Garden is Megumi's fully developed Domain Expansion, considered an anomaly in the JJK world. It is neither a traditional Open-Type nor Closed-Type domain; It transcends both definitions and becomes a unique Shadow Dimension.

Barrier Type: Absolute Void Shell — This Domain becomes a separate Shadow Dimension, almost like a separate planet. No cutting Domain from the outside (such as Sakuna's Malevolent Shrine) can cut it, and no pressure-based Domain from within (such as Jogo's Unlimited Void) can overwrite it. This shell is indestructible from both sides.

Logic/Structural Overview: Upon entering the Domain, a self-contained shadow environment is created around it. Visibility, the flow of cursed energy, and situational rules become shadow-based under Megumi's control. It is a completely sealed shadow dimension that determines its own internal logic. It cannot be disturbed by any external influence, either internal or external, unless Megumi allows it. The Domain's stability depends solely on Megumi's conscious control; It is not self-perpetuating.

Defense: This Shadow Domain is deemed impenetrable. External cutting techniques cannot penetrate it, and any internal overwrite from within the domain is also impossible. Domain overlap cannot occur unless Megumi herself allows it.

Binding Vow: A special restriction applies to the Domain's most powerful form (Fusion Beast Prime). The complete fusion of all ten Shadows is only possible within the Chimera Shadow Garden. If Megumi attempts a complete Fusion outside of this Domain, the technique will immediately collapse. This vow is the price paid for maintaining the stability of this Absolute Void Shell.

Domain Effect: Within the Chimera Shadow Garden, Megumi and all her Shukigami exist in shadow-based form, not in physical form. Therefore, physical destruction is meaningless: wounds or damage simply regenerate flawlessly. Damage is converted into bullet-like energy and recharges Megumi's cursed energy tank. Simply put, within the Domain, they are in a state of Infinite Regeneration; as long as significant cursed energy is available, they cannot be physically killed.

3. 👹 APEX SHIKIGAMI — FUSION BEAST PRIME (Ultimate Shikigami)

(Domain exclusive)

Fusion Beast Prime is the final form of the Ten Shadows Technique—the total fusion of all ten Shikigami into a single unified being. This is only possible within the Merger Chimera Shadow Garden.

Composition: Divine Dogs, Nue, Toad, Serpent, Max Elephant, Rabbit Escape, Round Deer, Piercing Ox, Tiger-type Combat Shikigami, and Mahoraga (which is the adaptive core of the entire formation). Tiger-type Shikigami is also part of this Formation.

Passive Ability: "Cycle of Samsara" (Dharma Chakra): If Fusion Beast Prime is destroyed by any attack within the Domain, the surrounding shadows recreate its original form within 0.1 seconds. This means it respawns immediately upon destruction, although each reconstruction consumes a significant amount of cursed energy.

Abilities: Fusion Beast Prime's powers are derived from the combined abilities of all its parts. These abilities are coordinated by a shadow-command logic, not the instinct of individual Shukigami. The main abilities are as follows:

Dharma Chakra (Mahoraga): Mahoraga's Adaptation Wheel temporarily or permanently negates any observed attack upon repeated use. This means that if an Advanced Technique (such as Hollow Purple or World Slash) hits this Beast once, the Adaptation Wheel automatically rotates to block that attack on the next use.

Tranquilizing Light (Round Deer): Continuously generates a Reverse Cursed Energy field. Any enemy within its range will have their Cursed Techniques rapidly nullified. This light energy immobilizes the enemy's Cursed Techniques.

Linear Escalation (Piercing Ox): This Beast's attacks increase in intensity and duration, manifesting its Wind aspect (Ox). Simply put, the longer this Tiger/Ox or Beast remains in running stance, the faster its power increases—up to potentially Infinite Force.

Thunder & Flight (Nue): Using Nue's electricity, the Fusion Beast can fire explosive lightning strikes and also fly through the air at supersonic speeds. This provides aerial maneuverability and lightning-based strikes.

Mass Manipulation (Max Elephant): This Beast can increase its weight tremendously (as massive as a black hole), creating a strong gravitational field. This field is useful for suppressing and controlling enemies.

Cloning (Rabbit Escape): Using the shadow replication ability of the first Rabbit Escape Shukigami, this Beast can split itself into thousands of smaller "Mini Fusion Beasts." This ability allows him to employ strategies such as mass attacks, creating illusions, and encircling areas.

The combination of all these abilities makes Fusion Beast Prime a highly adaptable and extraordinary form, which Megumi controls within the Domain.

4. ⚔️ COMBAT STYLE — OUTSIDE THE DOMAIN

(Combat Style Outside the Domain)

Summoning Fusion Beast Prime outside the Domain is not possible. In the outside world, Megumi's combat style changes completely. He fights like a tactical warlord, applying the abilities of Shukigami to himself without summoning them through a technique called Shadow Medium (Kage Bō).

Shadow Medium (Kage Bō): Megumi absorbs the curse techniques of Shukigami directly into his body. This is a middle path (shadow medium) in which he neither fully summons the Shukigami nor completely relinquishes their powers—but instead empowers himself by absorbing their shadow essence.

Observed Techniques:

Self-Adaptation: He has absorbed Mahoraga's Adaptation ability into his body. This means that if an enemy throws a strike or curse technique at him, the Adaptation Wheel activates, granting Megumi resistance or immunity to those attacks in the next instance. This way, he continues to learn, preventing the same technique from being used again.

Lightning Cloak: By harnessing Nue's electrical energy, he accelerates his reflexes and neural responses. As a result, his speed and reaction time are dramatically increased (as fast as a technique similar to Killua Zoldyck's).

Hydro-Pressure: Adapting Max Elephant's high-pressure aquatic abilities, Megumi can release powerful waves of dense water from her hands—in the form of impressive high-pressure water beams (like Kurapika's Piercing Blood).

Shadow Sink: Megumi can merge with her shadow within a densely luminous area (such as the ground or a wall). This allows her to suddenly disappear or quickly reposition herself in a dark area of ​​the environment.

Megumi's strategy in outdoor battles is based on mobility, efficiency, and adaptability. She absorbs the qualities of her Shukigamis to become an Unkillable Adapter, learning from each attack and adapting.

5. ⚠️ POWER SOURCE & WEAKNESSES

Cursed Energy Consumption: Maintaining Fusion Beast Prime and Indestructible Domain requires a significant amount of Megumi's cursed energy. It's said that this expenditure is so high that it could possibly exceed Sukuna's. The CE is nearly depleted within moments of unlocking the Domain, so Megumi must constantly utilize as much energy as possible. Megumi can summon up to 10 shikigami outside of the domain.

Shadow Siphon: When Megumi's CE becomes critically low, he resorts to an Extension Technique called Shadow Siphon. In this process, he recharges his CE by converting the shadow, or life force, of his shikigami into cursed energy. This technique provides an immediate (emergency power) recharge, but each exploitation weakens long-term stability.

Advanced Techniques: In Prime State, Megumi can generate a controlled Black Flash, which explodes curse energy at a high rate, providing even greater power. She can also use Reversed Cursed Energy (RCT)—a negative energy that neutralizes enemy curse techniques. To put it simply, Megumi can use the Reversible Cursed Technique even under extreme stress, and can unleash the Black Flash at will.

Burnout Risk: Excessive use of all these powers can ultimately prove fatal to Megumi. If she maintains Domain for a week continuously, or after an extremely intense prolonged battle, her cursed techniques may suffer burnout (dehydration/temporary failure). This means that after a vigorous bout of Domain, her cursed techniques may temporarily deplete, leaving her completely defenseless for a period of time. In such a situation, he resorts to his last resort—and unfortunately, even that doesn't last forever.

6. 📊 OFFICIAL ESTIMATED PARAMETERS

Attribute Level Description (Note)

Cursed Energy Reserves (S+) - potentially greater than Yuta Okkotsu (thanks to Shadow Siphon)

Offensive Capability (Attack Capability) - Unbeatable due to the unimaginable power of a God-Tier Fusion Beast Prime

Defensive Capability (Indestructible Barrier) - Unparalleled within the Near-Infinite Domain

Speed ​​(Speed) - Enhanced by the attributes of Special Grade Shikigami (e.g., Nue, Rabbit)

Tactical Intelligence (Strategic Intelligence) - Utilizes Master-Class Adaptation and makes situational decisions

These stats in Megumi's Prime State are only estimated. These stats show that within his domain, his defense level is nearly limitless and his offensive capabilities reach God-Tier, while in the outside world, he emerges as a sharp and skilled strategist.

FINAL ASSESSMENT

Megumi Fushiguro's Prime State is a unique combination of his technique mastery, binding vows, and domain architecture. In the outside world, he is an "Unkillable Adapter"—a supreme survivor, learning from each attack and reshaping himself. Within his domain, he becomes a "Creator God" of shadows, molding and controlling reality from shadows.

Yet, this immense power comes at a heavy price. Rapid energy consumption, the limits of adaptation, and the limited tolerance of the human body are factors that put Megumi in constant potential danger. If he exceeds his maximum limit or loses his domain after a prolonged battle, his Cursed Technique Burnout instantly weakens him.

> "Throughout Heaven and Earth, he alone is the Master of Shadows."

"Throughout all of creation, he alone is the Master of Shadows."