Shield of Faith
(Rule)Description: Force weapons used against a model with Shield of Faith lose the ability to instantly kill their target, they simply count as a power weapon instead. Psychic powers targetted against a model with Shield of Faith are nullified and will not work on a D6 roll of 5+.
Minor psychic powers have no effect on Adepta Sororitas units or characters at all, even those used by friendly psykers.