The Killing Stone is the crystallized resentment of the Nine-Tailed Fox after its death.
What Kenmyo Isayama and Fushiguro Toji didn't know was that some within the Jujutsu Sorcerer Association had already researched such things. The results showed they were unusable; once implanted, they would become completely uncontrollable, and the residual will within would erode the user, gradually turning them into monsters capable only of destruction.
Therefore, as the experiment was abolished, the Killing Stone was classified as top secret within the Jujutsu Sorcerer Association, just like the King of Curses's fingers. Its secrecy level was very high, elevated to a Special Grade Cursed Tool, and was strictly sealed, controlled, and contained from all sides.
If this item truly is a fragment formed from the essence and blood of the legendary Cursed Spirit Tamamo-no-Mae, then it should be fine if I'm a bit rough with it, probably.
When Kenmyo Isayama held Sister Mei in his arms, he used Psychic Energy to cover his fingers and touched this crimson, alluring stone. He had already tested it; the Cursed Energy's intensity was quite high, only emitting white smoke without any signs of dissolving, and it felt icy cold to the touch.
Moreover, just as he thought, the fundamental reason Sister Mei was like a completely different person was this Killing Stone. This little thing even tried to erode Kenmyo Isayama.
Although protected by Psychic Energy, the moment Kenmyo Isayama's finger touched the "Killer Stone," a surge of emotion, powerful enough to drive one mad, immediately rushed from his finger, directly attempting to invade Kenmyo Isayama's spiritual world.
The passive skill [Unyielding Will] triggered, instantly neutralizing this maddening emotion, thus infinitely weakening the contamination Kenmyo Isayama experienced this time.
Apart from another scene appearing before his eyes, Kenmyo Isayama was otherwise unaffected.
A colossal, snow-white fox, large enough to blot out the sky, roared in anger. Its crimson eyes glared, and an unbelievably powerful Cursed Energy, along with the dance of its nine tails, destroyed everything. It was a terrifying monster, a collective embodiment of maddening, endless tyranny, death, and resentment.
And Kenmyo Isayama actually saw a man, ant-sized compared to Tamamo-no-Mae's massive body, with four arms and two faces covered in tattoos. He was staring at this legendary Cursed Spirit with great interest, as if this was the powerful enemy he most desired.
Then the scene abruptly ended, and Kenmyo Isayama recovered, realizing that less than a second had passed in his subjective experience.
"Boss?"
However, Kenmyo Isayama's abnormality could not escape Fushiguro Toji's eyes.
"I'm fine."
Kenmyo Isayama waved his hand, immediately indicating that he was alright.
"Here, you can have it back."
Seeing his awkward face and his hesitant expression, Kenmyo Isayama suddenly remembered that Fushiguro Toji's Heavenly Restriction was still in his hands, so he tossed the blade over.
Fushiguro Toji took the blade and immediately stuffed it back into Ugly Treasure's mouth, truly scared. His Special Grade Cursed Tool, worth over 500 million, was with the Boss and he couldn't get it back. If he lost Heavenly Restriction again, would he have to fight others with his bare hands?
But Fushiguro Toji was overthinking; Kenmyo Isayama's magnanimity wasn't that small. Heavenly Restriction would exert its greatest effect in Fushiguro Toji's hands. As a mage, what he should hold was a staff, not a blade.
Kenmyo Isayama shook his head. He had investigated, and the core of Sister Mei's current body was this sinister stone. From this point, all her limbs were deeply rooted into her body like tiny tree roots, densely intertwined and basically fused with her blood vessels.
This body and the Killing Stone were inseparable, forming a symbiotic relationship.
Rather than parasitic, this situation was much better than Kenmyo Isayama initially imagined.
So he had an idea: perhaps he could save Sister Mei in her current state, allowing her to live on in another form.
That would be to extract all the overbearing and strange Cursed Energy from the Killing Stone and replace it with the Cursed Energy Kenmyo Isayama had exchanged with Psychic Energy. His Cursed Energy was quite pure, without other impurities, and would not harm Sister Mei's residual soul.
However, the feasibility risk was truly great, because Kenmyo Isayama didn't know if Sister Mei could continue living in this deceased body, whether it was supplied by Cursed Energy, or by the special Cursed Technique effect of the legendary Cursed Spirit's extremely strong vitality.
Furthermore, Kenmyo Isayama's actions would be equivalent to destroying this Killing Stone, which might shatter instantly and cause irreversible consequences.
So, to be cautious, Kenmyo Isayama could completely wait until his Psychic Energy level and mastery were higher before undertaking such a delicate operation.
The current success rate was too low. Sister Mei's body could be made into a crystal coffin using Kenmyo Isayama's Psychic Energy, greatly slowing its decomposition. At the same time, Sister Mei could be transported home, and a Psychic Energy array could be carved to maintain better protection and preservation.
By then, if Kenmyo Isayama's Psychic Energy level was strong enough, he might be able to revive the resurrected Tamamo-no-Mae as the vessel for Sister Mei's will.
But just as Kenmyo Isayama was about to put his plan into action, several streaks of blue light suddenly appeared not far in his line of sight.
"Butterflies?"
How could there be blue butterflies in the city at night, and why did their wings glow when they flapped?
Then, in the next moment, countless blue butterflies, appearing from who knows where, converged into a swarm, just like a trick Fushiguro Toji once pulled, and rushed directly towards Kenmyo Isayama and Fushiguro Toji at an extremely fast speed.
Fushiguro Toji had Ugly Treasure on him, so Kenmyo Isayama didn't activate the effect of [Tyranid Slayer], not wanting to accidentally injure an ally. He didn't expect to be caught off guard at this moment.
The noisy flapping of wings was chaotic, but Fushiguro Toji's hearing also picked up something different; it seemed that amidst the swarm, many unknown objects were rapidly approaching from afar, accompanied by sharp whistling sounds, seemingly aimed specifically at Kenmyo Isayama.
"Uncle."
Kenmyo Isayama called out to Fushiguro Toji without even raising his head.
"I'll handle this large-scale attack."
Hearing the Boss say so, Fushiguro Toji naturally did not drop his defensive stance.
As the surging swarm of insects was about to close in, Kenmyo Isayama glanced at them and said coldly,
"Burn."
No sooner had he spoken than the area beside Kenmyo Isayama and Fushiguro Toji was illuminated by scorching fire, and the temperature instantly rose by several degrees. If Kenmyo Isayama hadn't used a Psychic Shield to block this high temperature, they would probably be sweating profusely by now.
This scene, defying all reason, made the mastermind behind it widen his eyes.
"Impossible!"
The swarm of insects over there was completely engulfed by flames; the entire swarm was burning!
The high-temperature azure flames continuously incinerated the butterflies into ashes, and even the fifty-centimeter-long steel nails mixed in with the swarm were melted by the high temperature, turning into molten iron.
Each blue butterfly ignited with brilliant azure Psychic Energy flames, making the already dazzling butterflies look even more like tiny burning fireballs, slowly falling, and the flames dissipating with them.
Tens of thousands of butterflies were simply not enough to burn.
"Damn it, the experiment must be abandoned."
The hidden figure not far away said through gritted teeth.
But as he prepared to retreat, a sudden, merciless punch sharply struck him in the face, sending him flying ten meters uncontrollably.
Before he could even get up, the attacker stomped heavily on his chest, and he only heard the sound of breaking bones; several ribs were broken.
"Yo, isn't this just a kid?"
Although he said that, Fushiguro Toji's foot pressed down even harder, making the crushed bones crackle.