Madness

Pick 1 enemy HERO within 3" of the caster
and visible to them, and roll a number of
dice equal to the combined value of the
Attacks characteristics of all melee weapons
that HERO is armed with. For each 5+ you
can inflict 1 mortal wound on 1 enemy unit
within 3" of that HERO (you can choose
different units to suffer the mortal wounds
if you wish).