You summon a column of soft rain, mist and electrified air in a 60ft tall cylinder with a 30ft radius centered on a point you choose in range. The area is lightly obscured and must be vertically oriented. Until the spell ends, you can strengthen the spell with your magic on each of your turns as an action. If you do, the radius grows by 10ft. It can't exceed the spell's level x 10ft.
At the end of each of your turns, lighting pulses, and each creature in the area makes a Dexterity save. On a failure, a creature takes 3d8 thunder or double if you cast the spell just now or used your action to strengthen it this turn. On a success, it takes half the damage.
At Higher Levels. The thunder damage increases by 1d8 for each slot above 6th, as well as the maximum radius for the spell.
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