Related Clues:

• Diabolical doings
• Vicious
• Mean business
• Good fighter?
• Odious
• '___ falls on him who goes to seek it': Cervantes
• Hardly a good thing
• Good opponent
• Depravity
• Ahriman's forte
• Mephistophelean
• Austin Powers' foe
• Side in classic tales
• Like Old Nick
• Raunchy