Ghost

A Restless Spirit, a typical Ghost

Ghosts, also known as Spirits, are noncorporeal, astral beings. They have translucent greenish bodies that can be interacted with and despite being metaphysical, they can take and deal physical damage. They don't leave a corpse behind when killed.

Ghosts can be friendly NPCs, neutral or hostile to the player, depending on their type.

Undead Souls

These Ghosts are are the souls of once living creatures, usually humans, that have not yet passed over into the Mists. Despite already being dead, they can be killed again in combat. Undead Souls are usually, but not always, found near the place of their death.

For the most part, interacting with Undead Souls will be through quests and missions (like Leah Stone or Kilnn Testibrie). Still, some areas in the game are inhabited predominantly by Ghosts. These are the Crystal Desert where Ghosts are the primary residents remaining and the Realms of the Gods where Ghosts are often pawns in the struggle between the Gods.

In the Crystal Desert, Ghosts can be found as merchants, traders and collectors.

For sentimental or magical reasons, Ghosts can occasionally be found guarding items and areas. In these situations (like the Nolani Academy bonus and the Bloodstone in Abaddon's Mouth) the Ghosts will be hostile to the player.

Like all Undead, this type of ghost takes double damage from Holy damage.

Undead Souls are closely related to other noncorporeal Undead beings like Nightmares, Smoke Phantoms, Wraiths, etc.

Nature Spirits

These are ghosts of nature. They live in plants, waters, ground and air, and they guard their environment. Players encounter them mostly as Druids, and Rangers can invoke them as Nature Rituals.

List

For a list of Ghosts in the game, see: Category:Ghosts