After escaping from the pharmacy in the bustling town a while ago, he had been staying in the Infinity Castle, not showing his face.
The sudden, bizarre situation made him very panicked.
Especially, a strange game invitation letter kept appearing around him; even when he hid in the Infinity Castle, the invitation letter still arrived as scheduled.
This bizarre situation had kept Muzan Kibutsuji in hiding until now, until he discovered that Hantengu, one of the Upper Ranks, also showed signs of being entangled by the invitation letter.
Only then did he summon Hantengu to the Infinity Castle and send him to investigate information about the Reincarnation Game.
"How annoying, this feeling of being out of control."
Muzan Kibutsuji's hands didn't stop as he poured a bottle of potion into a test tube, murmuring softly.
Hantengu, who was prostrate on the ground, trembled slightly, pretending not to hear.
If he heard such things, he would be directly annihilated into blood plasma by Lord Muzan.
All these demons were created from Muzan Kibutsuji's blood, like contracted servants, their lives and deaths controlled by the Demon King.
"Fortunately, it's you, Hantengu."
Muzan Kibutsuji's lips curled into a smile of reassurance, yet the smile appeared exceptionally cold and chilling.
He was right; it was fortunate that Hantengu received the game invitation letter. Otherwise, if it had been any of the other Upper Ranks, no matter how much it pained him, he would have directly annihilated them.
Fortunately, Hantengu was sufficiently cowardly.
Even so, the killing intent in Muzan Kibutsuji's eyes did not diminish in the slightest.
If there was even the slightest thing amiss, he would directly kill Hantengu, even if he was a precious Upper Rank.
"Who exactly is it? A new trick from the Demon Slayer Corps, or…"
Muzan Kibutsuji closed his eyes, pondering various possibilities.
The possibility of it being the Demon Slayer Corps was very low; a group of weak humans, mastering pitiful Breathing Techniques, could not possibly come into contact with supernatural powers, let alone interfere with him.
It couldn't be a demon either; all demons were under his control, and no thought could escape him.
Even the one who escaped back then… her Blood Demon Art had no connection to games.
There was only one possibility, and a highly probable one at that: a new Demon King had been born!
This was Muzan Kibutsuji's conjecture.
Since he himself was able to become a nearly perfect life form a thousand years ago due to the combination of illness and medicine, there was no reason why no new special life forms should have appeared over the years.
And the game invitation letter was the ability, or rather, the Blood Demon Art, of that newly born special life form.
"A demon that I cannot control, and can even interfere with me, should not exist in this world."
Muzan Kibutsuji raised his eyelids, his gaze filled with anger, and a hint of hidden fear. He said calmly, "Nakime, send Hantengu away, then summon all Upper Ranks except him to the Infinity Castle."
He certainly wouldn't allow Hantengu, who had come into contact with the game invitation letter, to interact with the other Upper Ranks.
Soon, the demons with Upper Rank engraved in their eyes were teleported into the Infinity Castle.
"How incredibly fortunate, to be summoned by Lord Muzan."
Gyokko's distorted body crawled out of a pot, knelt on the ground, and looked excitedly at the Demon King high above.
Then he turned his head and saw that all the Upper Ranks except Hantengu were present.
"Could it be that Hantengu has been killed?" Akaza, with cherry-pink hair and dark blue tattoos covering his body, whispered.
All Upper Ranks being summoned had rarely happened in nearly a century; it only occurred when an Upper Rank demon died.
It was regrettable that the annoying Doma was present, making it clear that only the absent Hantengu could be the deceased Upper Rank.
Kokushibo, dressed in a samurai uniform, sat quietly at the table, saying nothing.
No matter who died, it had nothing to do with him.
Even when summoned by the Demon King, he maintained his Moon Breathing state, practicing nonstop for nearly a millennium since becoming a demon.
He just wanted to surpass a certain person.
For any other demon, even an Upper Rank, this would be a great disrespect to Muzan Kibutsuji and would result in punishment from the Demon King.
But Muzan Kibutsuji merely gave him a faint glance, as if it were a common occurrence.
"Lord Muzan, and fellow companions, it's been nearly a century since we last gathered, hasn't it? I truly miss everyone."
"And my favorite Akaza-dono, you weren't killed, which is a great relief to me."
Doma, with colorful eyes and a smiling face, spread his arms, eagerly seeking a response from the others.
But he found that only Gyokko nodded slightly at him; the other demons showed no reaction at all.
"Such a cold reaction, I'm so sad."
Doma still smiled, but wore a hurt expression.
However, all the demons could feel that although he was smiling, his smile remained utterly cold from beginning to end.
Like a fixed smile carved by a craftsman onto an ice sculpture.
Cold, indifferent.
A viscous, chilling, evil aura erupted, suppressing the chaotic noise.
"No Upper Rank has died; Hantengu has been sent by me to carry out a secret mission."
"I summoned you to the Infinity Castle because there is a new mission."
Muzan Kibutsuji disguised himself as a child, his tender face bearing an expression of disregard for life.
"Darn Hantengu, how enviable! Why couldn't I be the one entrusted with such a special mission by Lord Muzan?" Gyokko's deformed short arms swayed, emitting a regretful moan.
"The blue spider lily, has not been found for hundreds of years."
"The Ubuyashiki family is still active in every corner of the country."
"If you still cannot complete this new mission, I truly don't understand the meaning of your existence."
Muzan Kibutsuji's gaze was sinister, his violently fluctuating emotions causing veins to bulge. He said, "Go find it. It is neither the Demon Slayer Corps, nor human, nor demon, but a newly emerged special life form."
"Find them, bring them back, or kill them directly."
His voice echoed throughout the Infinity Castle.
The Upper Ranks showed expressions of astonishment upon hearing this mission.
A new special life form?
Not human, not the Demon Slayer Corps, and not a demon.
"How interesting, Lord Muzan. If it's neither a demon nor a human, could it be a god?" Doma's eyes showed an appropriate hint of excitement, but deep down, he felt no ripple of emotion whatsoever. Whether human or god, neither could stir his emotions; he had no interest in any of it.
"Such things do not exist," Muzan Kibutsuji said coldly. "Only I am the most perfect life form in the world."
"That newly appearing creature has a power of enticement. If anyone fails to resist being enticed, they will be killed by me."
He was referring to the game invitation letter.
If any of the other Upper Ranks were also chosen by the invitation letter like Hantengu, they were absolutely forbidden from accepting the invitation.
Otherwise, he would directly kill them.
"Understood."
Seeing Muzan Kibutsuji's serious demeanor, all the Upper Rank demons nodded and spoke.
Clang.
Several clear plucks of a koto string, and the Upper Rank demons vanished from the Infinity Castle, ending their brief exchange.
For a millennium, Muzan Kibutsuji had maintained absolute vigilance; even with demons whose lives and deaths he controlled, he refused to let them communicate with each other to prevent any accidents.
"The blue spider lily, if only I can find the blue spider lily, I will become the most perfect life form!"
Thinking of the regrets of nearly a millennium, Muzan Kibutsuji panted violently with anger.
He picked up the black invitation letter on the table, his eyes flickering, and thought, "Hantengu has already scouted the way for me, and there's no danger. Do I need to find a new demon to try?"
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