Abhor the Witch

In your first Movement phase, if there are any
enemy Psyker units in your opponent's army,
add 3" to the Move characteristic of each model.
Each Time a model makes a melee attack against
a Psyker unit, re-roll a wound roll of 1.
While an enemy Psyker unit is within 18" of a
Black Templars unit, that Black Templars unit
cannot perform any actions.