PSYCHIC ONSLAUGHT

Use this Stratagem in your Shooting phase,
when a GREY KNIGHTS PSYKER unit from
your army is selected to shoot. Until the end
of the phase, each time a model in that unit
makes a ranged attack with a psi weapon,
add 1 to the Strength characteristic of that
attack and improve the Armour Penetration
characteristic of that attack by 1.