Dancing Flames

You summon dozens of tiny, semi-sentient flames in an area equal to a 30-ft sphere. The flames are scattered about the area and target any creature who starts their turn within the affected area. Each creature in the area must make a Dexterity saving throw, taking 10d4 fire 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 5th level or higher, the damage increases by 1d6 for each slot level above 4th.