In most lore, possession is a hostile takeover. For the Nightmaretaker, it is a grim duty or a tragic mutation. He acts as a psychic sponge, absorbing the night terrors, phobias, and sleep-paralysis demons that plague humanity. By "taking" the nightmare, he grants the victim peace, but at a devastating cost: he must live through those horrors in a perpetual, waking state. He doesn't just see the monsters; he hosts them. The Anatomy of the Haunting
I notice you've shared the beginning of a title or concept: -ENG- The Nightmaretaker- The Man Possessed by ...