The Unbound Flux

Each time a friendly UNBOUND FLUX DAEMON WIZARD casts a spell that inflicts any mortal wounds, roll a dice for each unit that suffered any mortal wounds inflicted by that spell. On a 4+, that unit suffers 1 additional mortal wound.

You can use this command ability in your hero phase. If you do so, pick 1 friendly UNBOUND FLUX DAEMON WIZARD wholly within 9" of a friendly UNBOUND FLUX DAEMON HERO or wholly within 18" of a friendly UNBOUND FLUX DAEMON HERO that is a general. Add 1 to the casting rolls for that WIZARD until the end of the phase. A unit cannot benefit from this command ability more than once per turn.