Any psyker within 6" of a Pariah at the start of their turn must take a Morale check or fall back along with any squad they are leading. If the psyker is in close combat at the time and fails the Morale check, he will not fall back but will only hit on a 6 in the Assault phase for that turn.
Building an army? Create, validate and share your list with New Recruit, army builder for Warhammer 40,000 3rd Edition and many more games.
Try the builder