Thundershock

Gathering the power of Sigmar's storm into
themselves, the wizard unleashes this energy as a
roiling wave of pure force.
Thundershock has a casting value of 6. If successfully cast, roll a dice for each enemy unit
within 6" of the caster that is visible to them.
On a 4+ that unit suffers 1 mortal wound. In addition, subtract 1 from hit rolls for attacks
made by that unit until your next hero phase.