The moment he heard the knock, Muzan Kibutsuji was utterly stunned.
This was the Infinity Castle, not some ordinary house.
He could not imagine why there would be a knock here!
Muzan Kibutsuji instinctively turned his head slightly, trying to look toward the source of the knocking.
After the battle just now, the Infinity Castle was almost unrecognizable compared to before.
Many platforms that had originally stood in corners were now in the center of the Infinity Castle.
Muzan Kibutsuji searched for the source of the knocking, his five brains still thinking.
Although Yoriichi Tsugikuni had indeed suddenly broken into the Infinity Castle earlier, possibly even bringing along a demon Tamayo had transformed.
That did not mean the Infinity Castle was unsafe.
Or rather, for Muzan Kibutsuji now, the Infinity Castle was the only place left that could still be considered safe.
He instinctively refused to acknowledge that this place had become unsafe too.
After all, that would leave Muzan Kibutsuji with nowhere to take shelter.
Just then, Muzan Kibutsuji suddenly felt himself step on something.
He instinctively looked down and discovered that what he had stepped on was actually a strangely shaped knife.
Muzan Kibutsuji picked up the knife, and after a brief examination, he realized that this was definitely not something from the Infinity Castle.
Then...
This thing came from outside the Infinity Castle?
But how exactly did something from outside the Infinity Castle get in here?
Muzan Kibutsuji's five brains immediately began searching his memories. To recall the thing's origins faster, he even thrust a finger into his skull and kept twisting it around to aid his recollection.
Soon, Muzan Kibutsuji's gaze shifted.
He remembered. This was the knife that had been embedded in Akaza when he encountered Yoriichi Tsugikuni and Muzan opened a passage to pull