Thunderstorm of the abyss

You raise your hand up to the sky as a droplet ascends upwards eventually turning into a rift. The rift explodes shooting clouds in all directions, covering every patch of sky in a 200 ft by 200 ft radius of the caster. The Clouds turn the sky gray and dark red as tons of dark red electricity flow throughout the clouds. Whoever the caster points at, will have all the electricity in the clouds directed right at them. 2d20 Dark red lightning will strike the target doing 1d20 Lightning damage per lightning shock. The spell ends when the target is done being electrocuted.