Excruciating Frequencies

The sons of Fulgrim were the first to use sonic weaponry,
and are peerless wielders of deadly sound waves.
•Until the end of the phase, each time a model
in that unit makes an attack with a sonic weapon,
on an unmodified wound roll of 6, the target
suffers 1 mortal wound (max 6) in addition
to any normal damage.
•After shooting, select one enemy unit
that was hit by Excruciating Frequencies.
Until the start of your next turn, that enemy
unit cannot fire Overwatch or Set t