Storm Scroll

Reading aloud from the scroll, the wizard causes
Sigmar's storm to roil and lash out at the battlefield
the ground with anger.
Once per battle, in your hero phase, the bearer
can use this artefact. If they do so, pick up to 6
different enemy units on the battlefield, and give
each of them a different number from 1 to 6.
Then roll a dice. If there is a unit whose number
is the same as the roll, that unit suffers D6
mortal wounds.