Armour of Contempt

The belligerence of the Adeptus Astartes combined
with their post-human physiology makes them
unyielding foes to face.
{t}One ADEPTUS ASTARTES unit from your
army that was selected as the target of one or
more of the attacking units attacks.
Until the end of the phase, each time an attack
targets your unit, worsen the AP characteristic
of that attack by 1.