Ghoul Marcus is the main antagonist of the 2016 supernatural horror film and prequel Ouija: Origins of Evil.
He is a demonic entity that was accidentally summoned by Alice Zander and possesses her daughter, Doris. Marcus appears as a tall, thin shadowy figure with glowing yellow eyes and has no mouth.
He was portrayed by Doug Jones, who also played the Pale Man in Pan's Labyrinth.