Related Clues:

• Activity from below?
• It isn't good
• Dark force
• Wicked stuff
• Like Lucifer
• Like the devil
• The ___ One (sobriquet for Satan)
• Super-bad?
• "Who knows what ___ lurks in the hearts ..."
• Like a twin in horror movies
• Certainly not good
• Austin Powers' nemesis Dr. __
• Like many a movie twin
• Dr. ___ (enemy of Austin Powers)
• An amulet may ward it off, purportedly