Seismic Destabiliser

At the start of your Shooting phase, select one enemy unit within 12" of the bearer that is not fully visible to the bearer due to intervening terrain or because it is within a terrain feature. Roll one D6, adding 2 to the result if the unit is on or within a RUINS terrain feature: on a 3-5, that unit suffers D3 mortal wounds; on a 6+, that unit suffers 3 mortal wounds.