Lyric discussion by Travatar 

Cover art for The Dark Eternal Night lyrics by Dream Theater

As someone else said, this is based off of Nyarlathotep by H. P. Lovecraft. It was one of the few Lovecraft stories I had not read. Then a few weeks ago, while doing laundry, I found one a Lovecraft Short story anthology on the "leave a book or magazine here" rack. The similarities were there almost right off the bat.

@Travatar There are direct quotes from the story in the song too... "Endless stairs"... "choking room"... "shadowed on a screen"... "yellow evil faces"... "I am the last"... "waves of destruction"... after reading Nyarlathotep, it suddenly clicked in my head.