The Cobra is Mandrake's most evil and dangerous foe, apparent from the start of the story. In 1937, the Cobra seemed to be defeated, but returned in 1965, wearing a menacing silver mask. The Cobra's main goal is to acquire one of the two powerful Crystal Cubes, which increase mental energy. Mandrake and his father Theron guard them. Mandrake learned that The Cobra was secretly Luciphor, Theron's oldest son and, thus, Mandrake's half-brother. In later years, the Cobra was able to abandon his silver mask because his face had been reconstructed through surgery. He is sometimes accompanied by his assistant Ud.