Warp Lightning Storm

Pick up to D3 enemy units within 13" of the
caster and visible to them. Those units each
suffer D3 mortal wounds. Before making the
casting roll, you can say that this model will use
its warp-power accumulator to augment the
spell. If you do so and the casting is successful
and not unbound, the spell inflicts D6 mortal
wounds on each of those units instead of D3.
However, if you do so and the casting attempt
fails or is unbound, this model suffers D3xD6
mortal wounds.