Rotate Ion Shields

Use this Stratagem in your opponent's Shooting
Phase, when an IMPERIAL KNIGHTS
VEHICLE model from your army is selected as
the target of a ranged attack.
Until the end of the Phase, that model has a
4+ invulnerable save against ranged
attacks. If that model is an ARMIGER-CLASS
model, this Stratagem costs 1CP; otherwise,
it costs 2CP.