Transhuman Physiology

Use this Stratagem when an ADEPTUS
ASTARTES unit from your army that is
not a VEHICLE or a SERVITOR is
chosen as a target for an attack. Until the
end of the phase, when resolving an attack
made against that unit, an unmodified
wound roll of 1-3 always fails,
irrespective of any abilities that the weapon
or the model taking the attack may have