Ghost Rider is a fictional character appearing in American comic books published by Marvel Comics. He is the third Marvel character to don the identity of Ghost Rider, after Johnny Blaze and the Western hero known as the Phantom Rider, who used the name in 1967.

Nightmare is a fictional supervillain appearing in American comic books published by Marvel Comics. He first appeared in Strange Tales #110 and was created by Stan Lee and Steve Ditko. The character is depicted most commonly as a major enemy of Doctor Strange and Ghost Rider. Nightmare is the ruler of a Dream Dimension and he is one of the Fear Lords. He is also part of the group called The Six Fingered Hand. He can drain the psychic energies from the subconscious minds of dreaming beings.