Lachrimallus Tech-Priests, Magos Auxilia and Servo-automata in the unit have the Feel No Pain (5+) special rule. Friendly Adsecularis Tech-thrall units with at least one model within 6" of one or more Tech-Priest or Magos Auxilia with this special rule add +1 to their Feel No Pain Damage Mitigation rolls or gain the Feel No Pain (6+) special rule if they do not already possess the Feel No Pain (X) special rule.
Feel No Pain (X) When a model with this special rule suffers an unsaved Wound, it can make a special Feel No Pain roll to avoid being Wounded (this is a special Saving Throw which is made after unsaved Wounds are suffered).
Feel No Pain rolls may not be taken against unsaved Wounds that have the Instant Death special rule.
Roll a D6 each time an unsaved Wound is suffered. On a result that is equal to or greater than the value in brackets, the unsaved Wound is discounted - treat it as having been saved. On any other result the Wound is taken as normal.
For example, a unit with the special rule Feel No Pain (5+) would need to score a 5 or 6 in order to discount a Wound inflicted upon it.
This is a Damage Mitigation roll - any model may make only a single Damage Mitigation roll of any type for any given Wound (see page 174).