Fire Scale Child visited mainly to give Lu Xuan a thousand Sword Marks and to inform him that he would soon be in control of the Incomplete Secret Realm. He didn't linger around for too long.
After a while, he bid his goodbye and left.
Lu Xuan saw him off out of the cave, watched him turn into a line of red light, and vanish into the horizon before returning to the cave.
Fire Scale Child was extraordinarily gifted and powerful. Naturally, Lu Xuan was more than eager to receive his overtures.
He roughly estimated his current strength, and with the help of various treasures, he was now easily able to handle two or three average Foundation Establishment Late-term Cultivators. If he pushed himself, the number would be much higher.
Clearly though, this didn't apply to long-established names in the Sky Sword Sect.
Compared to the authentic teachings, there was still quite a distance, at most, he was only nearing it.