Ah, but they aren’t silent. 
I like the Restless.
The Shayardene horror stories speak of the undying lords of the Bloodless Reach – the worst abominations created by Xaos. Cunning and cruel, the kings of the Dead hunt down any living human who dares enter their realm, toy with them to give them some hope of survival… and then torment them to death and feast on their flesh.
One of the Nyr stories you’ve read (if you’ve got Int 2) speaks of rash scholars who crept off to the Ward to convince the liches to share the centuries of knowledge they possess. The Archlich Ghaesh himself appeared out of the snows to whisper his dark wisdom to them… and over two years of converse, he persuaded them one by one to cross the Ward to learn to see as he saw. Only one refused, insisting that everything could be learned by talking across the Ward. So Ghaesh patiently continued to whisper to him daily… until the scholar’s hair had grown long enough to blow across the Ward as he leaned in to hear the lich. Instantly Ghaesh seized the hair, pulled him bodily across, and devoured all of the foolish scholars.