C3658 Fifth Level Challenge

After arriving at the ruins once more, Luo Xiu no longer needed to be as cautious as the first time he entered.

Because he had some understanding of this place, he turned into a ray of light and flew towards the center of the ruins at an astonishing speed.

Not long after.

Luo Xiu saw the black building once again. It was like an attic, and the fifth floor was neither too high nor too short