( Wei Wuxian cants his head, listening. )

Huh. Hadn't heard of that technique before. Is it the lack of outside sounds? Water distorts noise, I'm guessing you kept your eyes closed, and when you're stilling your breathing, yes... was it in the dark?

( If it's cutting off senses, he'd guess it'd need to be. What an interesting idea. Definitely not what any immersions in water with resentful energies around managed for him, but the context was very different anyway. What he's heard from Lockwood makes that apparent. )

What was the driving need?