While their origin is unknown, multiple re-animated corpses were found on a parallel Earth by [[Cristina Thompson]] and [[Thomas]] while attempting to dispose of the [[Soul Reader (Book)]]. These re-animated corpses were only visible when under direct light, otherwise they remained invisible. The corpses appeared to have been reanimated through the influence of a large mobile metallic construct.
Both the gargantuan metallic construct and the re-animated corpses are collectively known as 'Mictlan', which was derived from the word 'Mictlantecuhtli'. Corpses re-animated by the controller appear to have their humanity stripped away entirely, as the [[Soul Reader (Book)]] is unable to connect with any remnant soul of the previous living individual. What becomes of the original soul component is unknown.
The same re-animated corpses and gargantuan metallic construct were later encountered by refugees fleeing inwards from the effects of [[The Crushing Fist]]. The controlling entity is enormous in size, with mobile metal legs stretching up above cloud height.