Thunderhawk cluster bombs

Once per battle, a Thunderhawk Gunship with this ability can make a bombing run against a single enemy unit it has moved over during one of its Movement phases. After the Thunderhawk Gunship has moved, pick an enemy unit that it flew over. Roll 3D6 for every VEHICLE or MONSTER, or a D6 for every other model, up to a maximum of 12D6. For each roll of a 5+, the unit suffers a mortal wound. Units consisting of only CHARACTERS may not be targeted by this ability.