Spindel der Feuerbrunst

In your shooting phase, you can pick 1 enemy unit within 12" of the bearer
and visible to them and roll a dice
. On a 1 this artefact cannot be used again for the rest of the battle. On a 2-3 nothing happens.
On a 4-5 that enemy unit suffers D3 mortal wounds.
On a 6 that enemy unit suffers D6 mortal wounds.