Utter Immolation

A vertical column of intense flame erupts from the ground in a 15ft radius, 30ft high cylinder centered on a point within range. Each creature in the area must make a Dexterity save, taking 6d8 fire damage on a failure, and half as much on a success. A creature reduced to 0 hit points by this spell is entirely burnt, leaving only ash behind.

At Higher Levels. When you cast this spell using a slot of 5th or higher, the damage increases by 1d8 for each slot above 4th.