What were those things they fought in The Orc King (possible minor spoiler)

[Wednesday Boy]

Just to cover my bases, this could be a spoiler (although I doubt it) so be warned...

Spoiler

I'm reading R.A. Salvatore's The Orc King and I can't figure out what those three eyed creatures Drizzt, Bruenor, etc. fought right when they went underground. Help me ENWorlders, you're my only hope.

(Thanks!)

 

[Xer0]

A reliable source tells me it's an Ethereal Mauler.