You conjure a roaring inferno to ignite everything within a 30-foot-radius sphere centered on a point within range. Creatures in the area must make a Dexterity saving throw. A creature takes 5d6 fire damage on a failed save, or half as much on a successful one.
On a failed save the creature is set on fire for 1 minute. At the end of each of its turns, the creature repeats the saving throw. It takes 2d6 fire damage on a failed save, and manages to put out the fire on a successful one. These flames are nonmagical.
The fire damages objects in the area and ignites flammable objects that aren't being worn or carried.
At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the radius of the sphere increases by 10 feet for each slot level above 5th.
* - (a bit of tinder)
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