Madness

Range of 3". If successfully cast, pick 1 enemy
HERO within range and visible to the caster and
roll a number of dice equal to the combined value
of the Attacks characteristics of all melee
weapons with which that HERO is armed.
For each 4+, you can pick 1 enemy unit within
3" of that HERO to suffer 1 mortal wound
(you can pick different units to suffer the
mortal wounds if you wish).