Slayers of Nightmares

Use this Stratagem in the Fight Phase, when an ADEPTUS CUSTODES unit from your army is selected to fight. Until the end of the phase, each
time a model in that unit makes an attack against
a unit with a higher Toughness characteristic than
its own, add 1 to that attack's wound roll. If that ADEPTUS CUSTODES unit contains 3 or fewer models this Stratagem costs 1CP; otherwise, it
costs 2CP.