Exchange!

"Earth Core Spiritual Essence. A pill refined from this would be enough to draw six-colored Pill Lightning." Ning Luo's gaze swept across the medicinal ingredients radiating astonishing energy, and he quietly drew in a breath. He had not expected to find even such a thing here.

"Seven-Colored Raw Stone?"

Ning Luo raised his brows slightly. The moment he recognized the item, he suddenly understood.

"Sir, how are you exchanging the Seven-Colored Raw Stone?" Ning Luo asked with a faint smile, unconcerned.

Only after hearing Ning Luo's words did the gaunt old man slightly raise his eyes. He said slowly, "Two Eighth-Grade Pills with at least three-colored Pill Lightning."

Just as Ning Luo was about to haggle with him further, Cai Lin suddenly took hold of Ning Luo's hand. Her slender, jade-like fingers were slightly cool as they gently traced a single word into his palm: "Buy!"

After taking the Seven-Colored Raw Stone, Ning Luo and the others swiftly vanished from the old man's sight. Only after turning a corner did Ning Luo stop. He tossed the Seven-Colored Raw Stone to Cai Lin and asked, "Is there something wrong with this?"

Yao Lao and Xiao Yi Xian, standing nearby, also looked at Cai Lin in surprise. They carefully examined the Seven-Colored Raw Stone, but found nothing unusual about it.

"Yes."

"No wonder only you could recognize it." Ning Luo shook his head with a bitter smile, then asked curiously, "So is this raw stone eight-colored or nine-colored?"

Cai Lin scratched her fingertip with her nail, letting a drop of blood fall onto the raw stone. After the seventh colored pattern on the stone's smooth surface, another colored pattern slowly wriggled into existence. "To determine how many colors this kind of raw stone has, one must use the blood of a Seven-Colored