The Dark Entity is 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.
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 was tasked by Proteus to search for the missing Ghostbusters after his spell was interfered with. Proteus communicated with him through a crystal ball. He apologized for not being able to find them and insisted there were too many places to look. Proteus was infuriated and shattered the crystal ball.
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. 
- On the Convention Cover of Ghostbusters: Get Real Issue #1, the Dark Entity makes a non-canon cameo in the upper left corner.
- Ghostbusters Get Real