Possible Clues:

• Rushdie's "Verses"
• Like inverted pentagrams
• Hellish temperature Isaac Newton suffered
• Devilish antics around middle of pentangle could be this
• Very evil
• As I can't move around, it's hellish
• Black cat's in a frenzy
• Did not stand heartless antic that was wicked
• Black may be so, pocketing a brown
• Like devil worship