Elemental Cataclysm

Choose acid, cold, fire, lightning, or thunder. Energy detonates in a 50-ft. radius centered on a point within range. Creatures of your choice in the area must make a DEX save, taking 55 (10d10) damage of the chosen type on a failed save, or half as much on a success.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.