Aggressive Adaptation

Use this Stratagem in the Fight phase, when an
enemy unit is destroyed as a result of an attack
made by a HIVE FLEET model from
your army. Until the end of the battle, improve
the Armour Penetration characteristic of melee
weapons that models in that model’s unit are
equipped with by 1 (e.g. AP 0 becomes AP -1).
Each unit can only be affected by this Stratagem
once per battle.