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.
Building an army? Create, validate and share your list with New Recruit, army builder for (HH V2) Horus Heresy (2022) and many more games.
Try the builder