Smokescreen

Whether unleashing warp-fume canisters from
hull-mounted launchers, sickly smoke from blood-
burning embrasures or some other malign artifice,
Chaos Space Marines thrice-cursed vehicles can
screen their acts of vengeance from the enemy.
Use this Stratagem in your opponent's
Shooting phase, when a Traitoris Astartes
Smokescreen 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, subtract 1 from that attack's