He listens to the notes and nods. He then takes Lan wangji's arm and writes, 'she has killed people'. The spirits mentioned losing their heads to him before and also that there were two queens but they wouldn't say which queen was worse. But it is important for people to know that she is dangerous and that they should avoid doing anything that might get them in trouble with her.

He doesn't want to scare people but he also doesn't want anyone to be caught off guard if something dangerous does occur. Perhaps he should have seen something like this as possible with the way the pool sometimes breaks down. It's dangerous in there when the waves get violent. And now with the cooling system also broken..there is no telling what could happen if other systems started to also fail. And if there is something in the walls that is causing those failures then that is also a concern. But unfortunately they didn't get any closer to figuring out that problem then when they started.