Ghost Warrior

A Ghost Warrior is a mechanical robotic walker created by the Eldar of the Craftworlds to carry out infiltration, assassination and sabotage missions for their military forces. Each Ghost Warrior is controlled by the soul of a dead Eldar ancestor drawn from a Craftworld's Infinity Circuit. A Ghost Warrior is smaller than the larger constructs referred to as Spirit Warriors. These robots were controlled by the guiding intelligence of the soul housed within their Spirit Stones while the robots were themselves constructed from a substance known as Stelhene that made them invisible to most forms of active and passive sensors. This Stelhene composition combined with a form of internal energy shielding to allow a Ghost Warrior to remain invisble to all but the naked eye.

Variants

 * Executioner-class Ghost Warrior - The Executioner-class was equipped with a Chainfist, Power Glove and Flamer. Its shell was coated with Cameleoline to make it hard to spot even in visible light.
 * Assassin-class Ghost Warrior - The Assassin-class Ghost Warrior possessed two Power Gloves and was outfitted with a Shuriken Catapult to provide long-ranged firepower. The shell of the Assassin-class Ghost Warrior was also coated with Cameleoline and the robot possessed a Teleport Homer to allow it to make instaneous and unexpected entrances and exits.

Canon Notes
Ghost Warriors were introduced in the 1st Edition of Warhammer 40,000 where they and the large Spirit Warriors served as alternates to Eldar Dreadnoughts. They have made no further appearance as originally conceived in the later editions of Warhammer 40,000, and seem to have been replaced by Eldar Wraithlord and Wraithguard constructs, which operate in a very similar manner and also are controlled by the Spirit Stones of long-dead Eldar warriors. It is possible now that the terms "Ghost Warrior" or "Spirit Warrior" simply refers to any Eldar combat walker or construct controlled by a spirit drawn from a Craftworld's Infinity Circuit.