Warp Lightning

If successfully cast, 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 use its warp-power accumulator to augment the spell. If you do so and the casting attempt is successful and not unbound, the spell inflicts D6 mortal wounds instead of D3. However, if you do so and the casting attempt fail