Imperial Knight Stratagem

ROTATE ION SHIELDS
Use this Stratagem when an enemy unit targets an
IMPERIAL KNIGHTS unit from your army that
has an invulnerable save (Stratagem costs 3CP if
the targeted unit is a DOMINUS CLASS, otherwise it
costs 1CP). Until the end of the phase, that vehicle
invulnerable save is improved by 1
(to a maximum of 4+)