Oggar
The self-styled "World's Mightiest Immortal", he was a major recurring enemy of the Marvels in the DC Comics stories published before the continuity-resetting Crisis on Infinite Earths miniseries in 1985. Oggar was a pupil of Shazam, and under the wizard's tutelage attained godhood and for a time joined the six gods and heroes who would empower Captain Marvel, but turned against Shazam after teaming up with Circe and giving her immortality, who cast him out and cursed him with horns, and cloven hooves instead of feet. He has divine strength and durability equal to Captain Marvel's and magic that enabled him to do nearly anything, like turning Captain Marvel back with lightning, or muting people, although each spell could only be used once. However, Oggar's power cannot be directly cast against a female target, as Circe cursed him. Thus Mary Marvel was usually called upon to deal with him. He creates the Cult of the Curse, and uses his hooves to bind men to it, if they leave his service they are driven mad, however if already mad they are cured. Unfortunately, he only gets 4 men to join him, all lunatics thinking they are: Samson, Nero, Napoleon, and Julius Caesar, and throughout the series they all leave. He joins the last pre-crisis Monster Society of Evil for an assault on the Rock of Eternity and helps Black Adam raise an evil army in Egypt.
Read more about this topic: List Of Marvel Family Enemies