Kibutsuji Muzan Muzan (1st update)

Kibutsuji Muzan quickly noticed the commotion outside and was immediately taken aback.

However, the demons being brutally ravaged by the tentacles had not truly died; they were merely being tortured. As such, the mechanism that "sent what they saw before death back to Kibutsuji Muzan" had not been triggered, so he naturally had no idea what was happening outside.

All he knew was that there was a tremendous racket outside, with countless demons wailing, screaming, or cursing madly. Booming sounds were also ringing out within the Infinite Castle, as though something was wreaking havoc.

Kibutsuji Muzan, who had been in his laboratory, immediately rushed out and loudly demanded to know what was happening. That laboratory was where he conducted research on himself and other demons. He wanted to find a way to overcome sunlight and become immune to the Nichirin Blade's suppressive effects—to become a true ultimate life-form.

After all, although he had been created by the great "Lord," fear of the sun was an innate trait of mysteries. As a mysterious creature created by a higher mystery, Muzan possessed the same weakness.

Yet Muzan was someone with an exceptionally strong drive to take initiative. Even knowing that this weakness would be difficult to overcome, he had continued searching for solutions by every possible means. His desire to survive had been fully transformed into proactive determination.

Upon hearing Muzan's question, the demon outside immediately dropped to his knees and prostrated himself. "L-Lord Muzan, someone has invaded the Infinite Castle and is destroying things everywhere! A large number of demons have already gone over, b-but the enemy seems incredibly strong. We can't stop them..."

At those words, veins bulged across Muzan's face. His expression twisted hideously as he snarled in rage, "You useless trash! You can't even stop a mere intruder!"