- Alongside Angmarim in Angmar and Evendim.
- Inside the Epic quest Volume I, Book 5, Instance: The Last Refuge - Gabilazan
- Inside the Epic quest Volume I, Book 5, Instance: Fire and Ice - Helegrod Treasury
Fell-spirits are a type of Shade, ghostly creatures summoned from the Void outside the realm of Arda to serve the Witch-king and the Dark Lord Sauron. It is these beings that enter the bodies of the dead and animate them as Wights. They are also the guiding intelligence behind the Watching-stones of Angmar and Mordor. Fell-spirits in their natural form can be summoned by Nazgul or by Angmarim priests and unleashed upon unwary adventurers.
Like many creatures of darkness, their exact origins are unknown. They may be spirits of evil Men, Orcs, or other creatures, or fallen Maiar who were lured to evil by Morgoth in the First Age. While undoubtedly evil and malicious, they are nonetheless slaves of Mordor and do not always show loyalty to their masters if freed from their control.
Other ghostly beings such as the Darkwaters are presumably of similar origin as the Fell-spirits.