The necromancer focuses zis necromantic power on the piece of obsidian and calls into the Void, summoning forth faded memories of the cruel Nagai Dynasty that gives shape to three Nagai Shadowspawns in an unoccupied space within 60" that exist for the duration of this spell or until they are detsroyed.   The Nagai Shadowspawn are friendly to the necromancer who created them from the Void and will obey the necromancer to the best of their ability. As long as the necromancer and the Nagai Shadowspawn are on the same plane of existence or either/or both are in the Void they maintain a telepathic link. Unless the necromancer can speak or understand Nagai, they can convey basic concepts & feelings but not communicate thoughts and ideas.   The necromancer may use an action to experience the world as one of the Shadowspawn (sight, hearing, touch) and becomes blind and deaf to zis own surroundings while doing so.   The Nagai Shadowspwan cease to exist at the end of the spell's duration but this spell may be recast without the material component to continue, to continue controlling the already existed beings.