A dark cloud of crackling doom instantaneously forms at the top of a 40-foot-radius and up to 40 foot tall cylinder centered on a point you choose within range. A jagged bolt and a dolorous thunderclap erupt from the cloud before it disappears.
The hostile creature with the most hit points within the cylinder takes 6d8 lightning damage. Each other creature of your choice within the cylinder must make a Constitution saving throw, taking 1d8 thunder damage on a failed save or half as much damage on a successful one.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the lightning and thunder damage increase by 2d8 and 1d8 respectively for each slot level above 3rd. The radius and height of the cylinder also increase by 10 feet for each slot level above 3rd.
* - (a pinch of sand and iron filings)
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