Lost Shandaral Spirit

Lost Shandaral Spirits are night elf ghosts that wander most if not all of the ancient ruins in the region of Crystalsong Forest, mainly the Ruins of Shandaral.

Some of the Spirits, mostly in the western area of the forest, are neutral but many are also hostile to all players. They appear to be the spirits of the ancient kaldorei race. Exactly why the spirits are here is unknown. It's possible they were killed by the dragon magic that transformed much of the forest into its current crystalline state.

The spirits that wander the ruins come in a variety of classes like most races, including hunters, warriors, and druids.

The spirits also act more like city NPCs than other usual killable NPCs would in areas, as some spirits sit and listen to others talking inside the ruins, while others can be seen sitting quietly, and others still can be seen jumping up and over furniture in the ruins, almost like they are exercising.

They are a rare case of being "fearable" undead.

Objective of

 * Drop Crystallized Energy for It Could Kill Us All.

Speculation
Their interactions may indicate that perhaps the spirits have either come to accept their undead condition and have learned to exist with it, or perhaps they might not even be aware they are spirits at all and continue to exist like nothing had happened, and they were still alive.