The Four Winds
A undead lich creature from a long gone era. Known as Marshwalker, this creature is always surrounded by swarms of undead. He is known to attack with powerful spells that seem to specilize in cold, poison, necromatic, and other arts that undead are immune to. He is always surrounded by a small horde of disease carrying zombies that move much faster then ones normally encountered now a days. Called Ju ju zombies by some scholars.
Preperations should include disease treatment, holy and undead fighting powers, and the ability to deal with waves of powerful undead minions.