UNYIELDING IN THE FACE OF THE

Adeptus Astartes - Battle Tactic Stratagem
Use this Stratagem in any phase, when a
MK X GRAVIS unit from your army selected as the target of an attack. Until the end of the phase,
each time an attack with a Damage
characteristic of 1 is allocated to a model in that unit,
add 1 to any armour saving throw made against that attack.