Mr. Rainman

Like Mr. Sandman, he too exists between the dream world and reality. He posseses all of Mr. Sandman's abilities as well like being able to make people fall asleep and walking into their dreams; he can see who a person really is by visiting their subconscious mind. however instead of eliciting dreams, he invokes nightmares in people's dreams which causes him and Mr. Sandman to clash often.