Body Refining Tower, fourth layer.
When Mo Yu arrived here, he looked around at the surroundings in astonishment.
Before him was a square roughly a thousand zhang wide. It was extremely ancient. The ground, paved with old stone, was covered in the mottled traces left by the passage of time, and an air of desolation permeated the entire space.
"We've finally reached the fourth layer of the Body Refining Tower." A voice came from the side. Cai Lin and Mang Lie approached, and Mang Lie spoke with lingering fear.
By comparison, Cai Lin was much calmer. The physical strength of a Nine-Colored Sky Swallowing Python was clearly not to be underestimated.
"You broke through again?" Cai Lin's beautiful eyes swept across Mo Yu's arms. Just now, she had felt the pressure emanating from his purple-gold arms. Even a Seventh-Grade Sovereign would probably have faced a formidable enemy.
"Hehe, I suppose so." Mo Yu smiled faintly.
His strength had not broken through, but his physical strength had increased greatly, reaching an even higher level.
"What a pervert..." Mang Lie shook his head in wonder. Then he pointed directly toward the center of the ancient square. "Look over there."
Mo Yu and Cai Lin immediately followed his gaze. Their eyes narrowed, and only then did they discover that in the center of the ancient square stood a black stone stele barely several zhang tall.
The black stone stele was neither tall nor massive. On this enormous ancient square, it was easy to overlook, which was why even Mo Yu had failed to notice it earlier.
"That is the Strength Stele," Mang Lie said again.
"The Strength Stele?" Mo Yu raised his brows slightly, as if he had thought of something.
"The rules of the fourth layer are actually very simple. You only