A miraculous energy suddenly surged through Uchiha Shigure's body, as though a miniature Chibaku Tensei core had formed inside him. His cells began dividing madly, while within them, five distinct bloodlines—remnants of the five Otsutsuki lineages that once descended to Earth—collided for the first time.
Each bloodline carried a completely different power, and when they clashed, Shigure's cells began devouring them one after another.
He felt no pain—only an indescribable surge of comfort. Every meridian in his body opened, and limitless energy flooded him. Gradually, Shigure sensed his own cells fully absorb and "digest" the foreign bloodlines. And amidst the transformation, the greatest change occurred in his eyes.
At first, they merely itched. Then, as the fusion deepened, the itching turned to a pulsing numbness that spread through his skull. In that moment, his cells evolved into true Otsutsuki cells. His eyes also began to change.
"It's still a light blue Sharingan… but its power has grown so much. My ocular techniques feel twice as strong," Shigure murmured.
Activating Kamui, he realized that his control over time had expanded dramatically. The temporal field no longer strained him—his stoppage duration had more than doubled.
Even so, he knew full time suspension was something not even the Sage of Six Paths had completely mastered.
Eager to test further, he summoned his Susanoo. The result left him dumbstruck—it manifested effortlessly.
"My dōjutsu power… it's been enhanced. The Senju bloodline must have awakened my Eternal Mangekyō Sharingan," he realized.
Before him, his Susanoo stood in its third form—a state he previously struggled to maintain.
"This time… let's push it to the fourth form!"
Gray energy burst outward as armor formed over the Karasu Tengu-shaped avatar. Shigure's Susanoo expanded, its full legs and feet taking shape for the first time. Towering higher, broader, and brighter—this was the fourth form.
"Still not enough!" Shigure exclaimed. "Let's go all the way—Perfect Form!"
He poured his chakra and dōjutsu power to the limit. The gray colossus evolved again, a titan of energy whose scale dwarfed any Susanoo he had ever seen.
"The strength scales directly with chakra and visual power… then this one far outstrips even Madara's or Sasuke's."
Bathed in silver-gray brilliance, his Perfect Susanoo felt almost divine—an embodiment of Asura, capable of shaping space itself.
"That's enough…" Shigure finally dispersed the mighty form and, with a deep breath, entered the legendary Slug Sage Mode.
"This time I can enter it effortlessly. No need to absorb natural energy—I can awaken it from within."
As he shifted, his face took on Sage markings, a rare deep blue resembling the patterns on a slug's back.
Seeing this, the Great Slug Sage spoke in awe: "Lord Shigure, you can directly assume Slug Sage Mode? Ah, I see—this is your method…"
"Yes. I can feel my power surging endlessly… it's as if I've surpassed the Kage level. If I had to classify it, I'd call it quasi–Six Paths level," Shigure replied simply.
"Quasi–Six Paths level, hm? That sounds about right," the Great Slug Sage responded, recognizing that his strength might already exceed Hashirama Senju's.
"Any other changes?" she asked.
"Beyond physical strength, chakra, and ocular amplification—not much. I think it's because Tsunade's Senju blood isn't as potent as Hashirama's. If I could acquire Hashirama's cells, I might reach straight into Six Paths level…" Shigure's ambition was clear in his voice.
"For now, this level is more than enough. Let's continue the Slug Senjutsu training," he reminded her.
"Very well."
The Great Slug Sage began her instruction with the first advanced technique: Tongue Lashing.
"So with this, I'll assume a slug-like form and spit Lava Release from my mouth?" Shigure asked after a few trials.
He spent some time mastering that, then moved on to the next ability—splitting and liquefaction.
"When attacked, you liquefy instantly and attach to your opponent, absorbing their chakra. With this, you are practically immortal," the Sage explained. "You may even divide your body into multiple parts—though naturally, they will all be slugs."
"Turning into a slug myself, huh…" Shigure grimaced. Still, he learned the art. It differed from Orochimaru's Snake Clone technique—it let him avoid lethal attacks by splitting into subtler, regenerative pieces.
"I'll probably rely more on the liquefaction, though…"
Days passed as Shigure trained tirelessly within Shikkotsu Forest. As the Great Slug Sage had said, this form of senjutsu focused on support rather than aggression, and Shigure finally understood Tsunade's reason for sending him here—his immense chakra made him uniquely suited to this domain.
During his stay, Shigure also mastered Tsunade's Superhuman Strength Technique through refining the Slug Senjutsu.
"By concentrating chakra with perfect precision into your limbs, and releasing it explosively, you achieve overwhelming physical strikes. Because it consumes vast chakra, Tsunade developed the Strength of a Hundred Seal to sustain it."
"But with my reserves… I can use it endlessly," Shigure said confidently.
He smiled faintly. "I didn't expect this visit to be so rewarding—Slug Senjutsu, Eternal Mangekyō Sharingan, and Superhuman Strength. It's time to return to Konoha."
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