Transhuman Physiology

Use this Stratagem in any phase, when a
PRIMARIS unit from your army is selected
as the target of an attack. Until the end of the
phase, each time an attack is made against
that unit, an unmodified wound roll of 1-3
for that attack fails, irrespective of any abilities
that the weapon or the model making the attack
may have. If that unit contains 5 or fewer models,
this Stratagem costs 1CP; otherwise, it costs 2CP.