Gu Chaoyan opened the item and discovered it was securely sealed. Upon closer inspection, she recognized it as a trace of godly power, similar to what Elder Lin had left in the sword. However, this trace of godly power surpassed even Elder Lin's cultivation in terms of strength.
Elder Lin, a Paragon Warrior, held the esteemed position of an Elder in the Supreme Sect's Weapon Refining Sect. Hence, the individual who left this divine power must have been an Elder from the Grand Unity Sect.
It dawned on her that the two disciples they killed were likely followers of that Grand Unity Sect's Elder. Otherwise, why would they possess such a life-saving artifact that they had not used before their demise?
One of the disciples may have underestimated Gu Chaoyan's cultivation, while the other possibly fell victim to her attacks.