Undead

"Undead" is the term used to describe those who have died yet still act on the mortal plane.
=== Ghosts and Lost Souls ===
Ghosts are souls who no longer inhabit their bodies, yet for some reason do not remain in the Spirit Realm. They often have some unfinished business on the mortal realm that keeps them between realms, or have been conjured by a necromancer. Some souls are powerful enough to deliberately tie themselves to the mortal realm. Very few ghosts are completely sane and usually have a tenuous link to the world.
=== Mindless Undead ===
Zombies and skeletons are mindless reanimated corpses. A portion of their soul still inhabits their decaying body, and they are usually created by necromancers. Powerful necromancers can raise entire armies of zombies and skeletons. Folk legends say not to disturb the bodies of the dead in case they return as walking corpses, and there are reported cases of zombies and skeletons rising after graves have been desecrated.
=== Ghouls ===
Ghouls are dead bodies inhabited by mad souls. They are feral and insane, and are consumed by a hunger for flesh, living or dead. Ghouls usually occur when a soul doesn't pass onto the afterlife properly, and returns to its decaying body, and is more common when many people have died in the same place. After large battles, if the bodies are not properly buried or burned, some of the bodies will return as ghouls and feed on their fallen companions.
=== Wight ===
Wights are exclusively created by magical means. They are corpses raised by necromancers usually, their souls ripped from the Spirit Realm and restored to their body, animated by death magic. Unlike most other forms of undead, Wights retain the mind that they had in life, though often they lose some memories and have a tenuous grip on reality. Nevertheless, they are sentient. 
=== Liches ===
Liches are masters of death magic who have conquered mortality. They are able to retain the appearance of a living being, while actually being dead, and can absorb the life force of dying creatures.
=== The Forsaken ===
When the truly evil and remorseless pass on to the afterlife, they do not find rest. The King of the Dead judges these souls, and judges them to be monsters. Thus, monsters they become. The Forsaken are horrific undead monstrosities of bone and rotting flesh, usually an amalgamation of many bodies. They roam the Spirit Realm, as a challenge for souls seeking the Hall of Judgement. Sometimes they are summoned into the Mortal Realm, and they cause nothing but terror.