While a friendly ADEPTUS CUSTODES unit (excluding MONSTER/VEHICLE unit) is within range of an objective, melee attacks that target that unit with a S greater than that unit's T have -1 to wound rolls.
Favoured Ka'tah Kaptaris
Additional Effect: You can select one enemy unit engaged with your unit. That enemy unit must make a battle-shock roll, with -1 to that battle-shock roll. You cannot select the same enemy unit for this effect more than once per phase.