Great bolts of heavenly lightning plummet to the ground at four different points you can see within range. Each creature in a 20-foot-radius sphere centered on each point you choose must make a Dexterity saving throw. The sphere spreads around corners. A creature takes 8d8 Lightning damage and 8d8 Radiant damage and is Blinded and Deafened until the end of their next turn on a failed save, or takes half as much damage and suffers no conditions on a successful save. A creature in the area of more than one strike is affected only once. 

Until the duration of this spell ends, you may spend an action to cause 4 additonal bolts to fall.