Warp Lightning

Pick 1 enemy unit within 13'' of the
caster and visible to them. That unit suffers
D3 mortal wounds.
Before making the casting roll, you can say that
this model will augment the spell.
If you do so and the casting attempt is successful
and not unbound, the spell inflicts D6 mortal
wounds on that unit instead of D3.
However, if you do so and the casting attempt
fails or is unbound, this model suffers D6
mortal wounds.