Vaénor's Vortex

Bright flames flow from the tips of the fingers of your outstretched hand, swirling out into a vortex of fire around you as you spin. Each creature in a 15-foot-radius cylinder centered around you must make a Dexterity saving throw. Targets take 6d6 fire damage on a failed save, or take half as much damage on a successful one. The caster, centered in the eye of the vortex, is not affected by the flames.

The vortex lasts until the casters next turn. Any enemies that end their turn within the vortex must take an immediate 4d6 damage with no save.

Ranged attacks, excluding AOE spells, on the caster are taken at disadvantage through the flames' cover and velocity.

The flames ignite flammable objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.