Zombies are creatures who are brought to unlife in various ways. Zombies fall basically under two groups; those who come in contact with a virus or bacteria that causes the infected person to die then come back reanimated as a person with a craving for flesh. These type of Zombies are seen in most zombie films. The other type of Zombies are those that are raised by evil magic. This usually involves a necromancer or some other spell caster. Voodoo magic is also associated with Zombies. There have been cases reported of Zombies wandering around due to Voodoo magic.(Note: This is part of the information I got while looking around at Zombie info and if I have offended any of the people practicing Voodoo I'm sorry because to tell the truth I really don't know much about the Voodoo belief system.)
WRAITH
Wraiths or shadows were once the people who practiced the dark magics. These people tried to extend there life for hundreds of years but the result was not what they expected. All that is left of them is a soul that lacks substance, and the persons mind, which has been driven mad by its most hideous fears. Wraiths are ethereal creatures so it's possible that they can move through solid objects. Their faces are tortured souls and the presence of a wraith brings terror.Wraiths are also known for an area of extreme frigidness around them.Only holy or blessed weapons can harm Wraiths
NIGHTMARES
Nightmares are wingless undead horses. They are one of the greatest aids to the undead. These are the bodies of great war-horses that are brought back to unlife by necromantic powers. Nightmares unlike mortal horses have the ability to move through terrain that might be blocking their path they can move though walls and dense vegetation with ease.Winged nightmares are monsters that had wings brought back to life such as Griffons, Hippogrifs and Manticores. These creatures are much hard to raise from beyond the grave compared with the normal nightmares
