Haunter of the Dark
A monster from the dark gulf of Chaos which could be summoned by the angular stone forged in Yuggoth called the Shining Trapezohedron. He is an avatar of Nyarlathotep. The stone was discovered in Egypt by Professor Enoch Bowen in the 1840's and used by the Starry Wisdom cult.
[Haunter of the Dark - H.P.L.]