Funny thing about 'Mordor' as a lyric: I've been listening to Led Zeppelin's Ramble On as part of a mix, and I kept hearing a line as "in the darkest depths of Mordor". I went to look up what the real lyrics must be only to find that not only was I hearing it right, but Zeppelin actually wrote songs about The Lord of the Rings.

The verse continues on to say that "Gollum and the evil one crept up", and yeah, they really mean Gollum. Made my day.