Just would to add Sauron could raise the dead, because he could tap into the unseen world and somehow tie it with physical.

Other things Tolkien specified were like this are the Barrow-Blades or the swords meant to kill or wound Ring-Wraiths (Nazgul Sauron Servants), Also some characters like Tom Bombadil could actually bring back to dead evil spirits or dispell them at will, Aragorn Commanded them and muster the men of dunharrow (dead).

Also Dul Gundur, means tower of sorcery his reach is even nature twisting, animals go insane and evil creatures appears.

Just would to add Sauron could raise the dead, because he could tap into the unseen world and somehow tie it with physical.

Other things Tolkien specified were like this are the Barrow-Blades or the swords meant to kill or wound Ring-Wraiths (Nazgul Sauron Servants), Also some characters like Tom Bombadil could actually bring back to dead evil spirits or dispell them at will, Aragorn Commanded them and muster the men of dunharrow (dead).

Also Dol Guldur, means tower of sorcery his reach is even nature twisting, animals go insane and evil creatures appears.