Su Zimo pointed at the jade-white stone on the ground and asked, "What does that stone has to do with the Illumination and Nether Glow that you mentioned?"
After pondering for a moment, Su Zimo said again, "I once obtained a secret skill from that stone, the Illumination Sword Formation."
"There's no mistake,"
The red-headed ghost nodded. "This should be the legendary Illumination Stone."
"Illumination Stone?" Su Zimo frowned.
The red-headed ghost replied, "There's different sayings as to where the Illumination Stone came from and how it was formed. Some people theorize that it was formed from the Extreme Yang energy of a world while others think that it's a speck of dust from Illumination."
"However, it's undeniable that the Illumination Stone is related to the Illumination Stone. The Illumination Sword Formation that you comprehended should be a secret skill that someone comprehended using the Illumination Stone."