Against Daemons, hits wound automatically and inflict D3 wounds per hit. Against other targets, +3S when rolling to wound. Each wound inflicts not 1 but D3 wounds.
Source: Warhammer Fantasy: 5th Edition
Against Daemons, hits wound automatically and inflict D3 wounds per hit. Against other targets, +3S when rolling to wound. Each wound inflicts not 1 but D3 wounds.