Cataclysm

A radiant sphere of energy and fire erupts from a point of your choice within range. Creatures and objects within range suffer the following damages:

• within 20 ft. of the target: 8d8 force damage
• within 40 ft. of the target: 7d8 radiant damage
• within 80 ft. of the target: 6d8 fire damage
• within 160 ft. of the target: 5d8 bludgeoning damage
• within 320 ft. of the target: 4d8 thunder damage

The spell damages objects and ignites flammable objects in the area within 80 ft. of the target that aren't being worn or carried.

Creatures within a 320 ft. of the target must succeed on a Strength saving throw or be pushed 25 ft. away from the target in a straight line and knocked prone.

Smoke and dust heavily obscures the area within a 160 ft. radius around the target for 10 rounds or until it is cleared by strong wind.

Every creature that enters the area within a 80 ft. radius of the target for 1d4 hours after the spell is cast has to make a Constitution saving throw at the beginning of each of their turns until their leave the area. On a failure they suffer 2d6 fire damage.

Every creature that enters the area within a 40 ft. radius of the target for 1d12 days after the spell is cast has to make a Constitution saving throw at the beginning of each of their turns until their leave the area. On a failure they suffer 3d6 radiant damage and are blinded until they leave the area.

Every creature that enters the area within a 20 ft. radius of the target for 1d4 years after the spell is cast has to make a Constitution saving throw at the beginning of each of their turns until their leave the area. On a failure they suffer 4d6 force damage and are cursed until they are subjected to a remove curse spell or similar magic. While cursed a creature suffers a 1d4 penalty to all attack rolls, skill checks and saving throws.

Every 6 hours there is a 20 percent chance that a random Elemental or Fiend with a CR between 0 and 8 appears in the area within a 20 ft. radius of the target.