A Soul Grinder's construct body is fashioned by the Forge of Souls from the substance known as Warpmetal.
Warpmetal is the name given to the metallic substance used by the daemonic artisans of the Forge of Souls in the Realm of Chaos to craft daemonic machinery, such as the construct bodies created for the Soul Grinders produced by the forge from the essences of those Daemons whose physical bodies have been slain.[1a]