The Sidar Palace grants additional benefits from all specialistis and settled Great Persons throughout your empire. Sidar unit of level 6 or higher can cast Wane and be transformed into a Shade, which can then be added to a city as a Great Specialist of any type (except Prophet). The Sidar unique Hunter, Divided Soul, has the Sever ability in effect granting a short distance teleportation of sorts. Ghosts, the Sidar Assassin replacement, are stronger than their counterpart and has access to the Hidden promotion granting them invisibility.