C3313 CHAPTER3313 HE GUARDED UNTIL THE CLOUDS PARTED TO SEE THE MOON

"This should be the soul of a major power that was left behind a long time ago..."

"Then seal it here..."

... "When specific conditions are set out, this soul will make a sound according to special procedures..."

"From the looks of it, it wants us to enter this Cloud Top Academy and pass some tests to enter the top floor of this Cloud Top Academy."

"According to this voice