The Dark Entity (believed by fans to be Loki) is a demonic being in the form of a face in the clouds which waits to destroy the world and bring on Ragnarok. While nothing much is explained about the creature, it appears to be a pure evil creature that smiles as man fails, being something like Satan.
Upon hearing Jeremy's incantation, the Dark Entity empowered him and gave him a flute to bring about the end of the world. After a period of four days, the Dark Entity reappeared above Manhattan, above the Karstick Building. After Jeremy saw the error of his ways, he played the Song of Life. This allowed the Ghostbusters to seal the Dark Entity and help prevent Ragnarok.
The Dark Entity's power is so great that a single piece of paper with the word "Ragnarok" written on it caused the P.K.E. Meter to explode. Which means its class level is between Class 7 to 10 or higher. Not even the Ghostbusters' Particle Throwers could effect it without Jeremy's help.
- Not much is known about this dark entity except it may have been a slight nod to Sauron from The Lord of the Rings. Jeremy also quoted the words on the Ring from Lord of the Rings.
The Real Ghostbusters
- "Ragnarok and Roll"