Related Clues:

• Good opponent
• Depravity
• Ahriman's forte
• Mephistophelean
• Austin Powers' foe
• Human tempters
• Pride and envy, e.g.
• Side in classic tales
• Like Old Nick
• Mephistophelian
• Dastardly doings
• Satan's field
• Serious lapses
• Wicked ways
• You prefer the lesser of these two