Dour Duty (1CP)

Use this Stratagem in your opponents Shooting
phase or your Charge phase, when an
IRON WARRIORS unit from your army is
chosen as the target for an attack. Until the end
of that phase, when resolving an attack made
with a ranged weapon against that unit, worsen
the Armour Penetration characteristic of that
weapon by 1 for that attack
(e.g. AP -2 becomes AP -1).