All Beyond the Yonder Seas and Streams
5-level Enchantment
A violent squall of sulfuric rain sweeps through a location you choose within range. The area of the squall consists of up to ten 10-foot cubes, which you can arrange as you wish. Each cube must have at least one face adjacent to the face of another cube. Each creature in the area must make a Dexterity saving throw. It takes 4d8 acid damage on a failed save, and takes half as much damage on a successful one. The squall also damages objects not being worn or carried.
The area of the spell then becomes covered in yellow, caustic sulphur for the duration of the spell. The sulphur floats in place when cast on water or underwater, and clings to solid surfaces. When a creature moves into or within the area, it takes 1d8 acid damage for every 5 feet it travels. The sulphur is flammable. If any part of the area comes into contact with fire, the entire area erupts into flames and burns away in 1 round, dealing 4d8 fire damage to any creature that starts its turn in the fire. The spell ends when the sulphur is burned away.
When you cast this spell using a spell slot of 7th level or higher, the initial damage increases by 1d8 for each slot level above 6th.
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