[Well, Lan Wangji seems well-suited to giving orders, and the ghosts seem content enough to follow them after their meal of qi, so that's good.

As for the warning, he shrugs.]

They're not powerful enough to harm me even if they do. And since I can't use my own power directly or it'll get sucked in, it might as well serve in another way. I only wish I could give them more.

[He tugs at the bandage around his neck that hides once of the cursed shackles which have fascinated both Lan Wangji and Wei Wuxian, and so far resisted their every attempt.

Then again, if he didn't have the shackles on, the question of sealing this place would be a mere triviality.]

Have you ever seen demons like those before? I don't think I have. I know of demons who can suck energy of course, but I've never seen any with this appearance.