Psyker hero unit that can choose to channel his abilities in two ways: either to protect or to destroy.
The Spiritseer has a dual existence, caught on the cusp of life and death. The power of life he delivers to the ghost warriors of the craftworlds, not only by placing the spirit stones that animate them within their wraithbone shells, but by using his psychic powers to enhance and invigorate them during battle. The gift of death he brings to those who threaten the craftworld. A simple gesture from a Spiritseer can see his enemies assailed by lithe, powerful constructs that are all but indestructible, each immortal hero burning with a cold malevolence from beyond the grave.