Because Lu Yuan was at several important places.
He saw the Nine-Colored Altar everywhere.
It's hard not to let one's mind wander.
He knew its significance was extraordinary.
In such a situation, of course, he needed to ask clearly before making any assumptions.
And obviously, Jiang Ningxian, as a member of the Jiang clan, and not in a low position, surely knew many secrets.
So he wanted to get relevant information from her, and then combine it with previous information.
Who knows, maybe at some point, he could really uncover the ultimate secret?
Beside him, Jiang Ningxian fell into a slight contemplation after hearing this.
In the end, she shook her head and then said, "Actually, there aren't many records about the Nine-Colored Altar within my clan, only that it's used for warfare. But exactly who it's fighting against is unknown. Our ancestors speculated that all of the secrets would only be answered in this world."
