Combustion

Fire coalesces into a whirling circle around the caster for a moment before exploding. Any creatures within 5 feet of the explosion must make a dexterity saving throw as the explosion deals 2d8 fire damage on a failed save. Any creature grappling the caster has disadvantage on their saving throw. Creatures that succeed the saving throw take half damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.