MIASMAL SHROUD

If successfully cast, pick 1 enemy unit within
18" of the caster that is visible to them and
roll 3 dice. For each 5+ that unit suffers 1 mortal wound. In addition, if you rolled a triple, subtract 1 from hit and wound rolls
for that unit until your next hero phase. If
you rolled a double, subtract 1 from hit rolls only for that unit until your next hero phase.