the Anti Paladin. Good got you down?  a great evil NPC to liven up your PC's lives.

      the Witch. The MOST POWERFULL NPC SPELLCASTER EVER!  DM's; scare the hell  out of your party with this little lady.

      the Cthulhu Mythus. Converted to AD&D.  May the Gods bless H.P. Lovecraft.

      Barney. DM's hit the PC's with a 'Power Word I Love You'