Great Mask of Undeath (axle) (shapeshifted)

The Mask of Undeath is a Kanohi that siphons off a fraction of its user's life energy from their body, which it infuses the body with after death. The body is then animated by the lifeforce, and attempts to fulfill the last objective the user had while living. The mask gives the user no other special power and will slow down their processing, making it harder for them to fight. While undead, the user will lose all illumination in their eyes, making them empty and black. (Bs01)

Brotherhood of Makuta shapeshifted variant.