Thought it was high time I pointed out something of import about how this line was transcribed. I wasn't done poorly I should have elaborated more at the time.

"The thought of these walls serving the Dark One’s whim sends chills through me.”

"These walls" should actually be: Ixual (ee-zwal). Which were recorded to be the servants of Kallroth. Not much else has been given on them in the tomes you have found to date.