She repeats what they counterfactually said.

[Kinda tempted to steal Jin Ling's explosives and counterfactually blast our way into more of them, see if they're all like that.]

[I suppose an advantage to having a ridiculous reckless person on the team is that we can counterfactually try weird things that don't work if I try to convince people of normal risk aversion to intend them!]

[Happy to be able to oblige.]

[Counterfactually knock yourself out.]

They're all like that. Also Jin Ling sometimes figures out who took his stuff and chases him but that's less important. 

If he doesn't tell her he'll never know! She faithfully passes along everything he tells her to the rest of the party.

He mentions it when it happens, it does kinda interfere with the stuff he's trying to do and might turn out to be important later. 

"I think," he says in reality once all the castles have been counterfactually checked, "that if we can do it before Jin Ling gets himself in trouble, or if we can dissuade him from doing so, that the next step might be talking to Nie Huaisang. If anyone knows what's going on here it ought to be him." 

"Why would he know?"

"'Cause this is the Nie sect's area and he's the current Sect Leader, apparently, his big brother died while I was dead and hasn't had any such miraculous resurrection. Of course, the fact that he should know doesn't necessarily mean he does know." 

"If he's not around dealing with the man-eating castle and does know about it that's fairly neglectful."

"To be fair, Jin Ling only got eaten after he exploded his way in, that's not very likely to happen to random bystanders. But that doesn't explain all the corpses in the walls, so..."

"We had reports of it eating people before he got anywhere near it, too."

"Yeah, but rumors can be exaggerated. There's definitely something weird as hell up with these things, but it's not guaranteed to be the same weird thing everyone thinks it is." 

"Yeah. The walking corpses, who were they - people should bury their dead with nametags, it'd make forensics much simpler -"

"Normally the nametag goes on the grave, not the corpse! Which doesn't help much here, or in cases where the graves are badly damaged by natural disaster, or..."

"Or in any of the many cases in this universe where the corpse doesn't remain at its home address!" She shakes her head. "Okay, who wants to be ready to ask Nie Huaisang."

"I can go!" 

"We will both go." 

"We can try it a bunch of ways, see who gets the best reception." What if she sends the pair of them.

Well first of all they're going to have to spend more than one iteration FINDING him; he is not, apparently, at the Unclean Realm, nor evidently at Koi Tower or Cloud Recesses where he can often be found begging his late brother's sworn brothers to solve this or that problem he has. 

Well, fortunately they have a PRECOG. Where is this guy.

Staying at a nearby inn, apparently. 

And if they send Wei Wuxian and Lan Wangji in the available combinations to go bother him?

Well, uh, it turns out that the "man-eating castles" are the Nie family tombs. 

They don't actually eat anyone when you don't go around blowing holes in them! But uh the Nie clan's sabers are...aggressive...and it's best for everyone's safety if they're formally interred with a bunch of bodies just on the verge of rising as walking corpses so that the swords' spiritual energy and the corpses' malevolent energy can cancel each other out and the swords don't end up flying around looking for evil to stab once their wielders are dead and there isn't anyone who can just make them not do that anymore.