Tempest of Judgment

You create a mobile cataclysmic storm that moves across the landscape under your command. Each round while you focus, choose the storm's mode: divine lightning (8d8 lightning damage to all within, Quick save half), purifying rain (heals allies 4d8, damages undead 6d8 radiant, Quick save half for damage), or winds of judgment (knocks prone, moves creatures 60 feet, Quick save negates push and prone). The storm moves up to 120 feet per round. Purifying rain's healing has no effect on constructs or undead and bypasses the body entirely.

The DN controls collateral damage to major structures, populations, or terrain. The storm is clearly divine and supernatural, visible and audible for dozens of miles. You can end focus early to make the storm dissipate immediately. "Exposed" applies to lightning/wind targeting outdoors without solid overhead cover; indoor creatures are unaffected unless the DN rules the structure compromised.