Tri-Lightning

In cloud locations, you can launch a lightning bolt that, just before it hits you, splits into three and hits equidistant points on the ground(4.5 meters away from the caster). Those within 3 meters of the affected location must take a Dex check DC 8 + Cast Modifier + Proficiency. If they fail, they will suffer 5d10 lightning damage and will be paralized; if they succeed, they take half the damage.