The lamp Mu Qiuniang mentioned is actually a "life lamp," only lit by those at the manager level and above, or some direct disciples, and is enshrined with the Ascended elders of the Hidden Immortal Sect in the Tribute Hall, enjoying the incense offerings.
As long as the disciple is not in mortal danger, the "life lamp" remains lit; if they die, the "life lamp" extinguishes.
Additionally, if a loving master wants to, even without the qualification to light a "life lamp" for their disciple, they can either make or have someone make a "life plate," which serves a similar purpose. The difference being that the "life lamp" can record the scene at the disciple's moment of death and mark the person for revenge purposes, whereas the "life plate" can only mark, not display the scene.
Since Mu Qiuniang is an elder of the Hidden Immortal Sect, she naturally has the full authority to light a "life lamp" for her direct disciples.
