Transhuman Physiology

Use 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.