#5: NEREAS
Known For: Tormenting sailors, shape-shifting, and giving his enemies killer migraines.
A statue of this fearsome water demon resides at the Acropolis Museum in Greece. Sporting 3 heads and carrying symbols representing the elements of fire, water, and air, Nereas has a wicked-looking triple serpent#DY#s tail, wings, and a habit of changing shape when you least expect it.
Would make a great Diablo 3 boss because: Nereas, as we imagine him, would make an extremely tough boss simply because of his ability to switch between weilding 3 devastating elements. The fact that he can turn into whatever the hell he wants also doesn#DY#t make him any easier to defeat in a fight.