Aesier's Incandescent Symphony

You play or sing a short, building crescendo, and a glowing, transparent image of a burning rose (in a color of your choice) instantaneously blooms into existence at a point within range. Each creature in a 20ft radius centered on that point must make a Dexterity saving throw, taking 6d6 radiant damage and be covered in the radiant flame for the duration on a failure. On a success, the creature takes half as much damage and is not covered by the flame. Creatures covered in the flame cannot benefit from being invisible and attacks against them have advantage as the radiant flame reveals their form, including weak points and openings in their stance. A creature can make an additional Dexterity saving throw at the end of each of their turns to disrupt the radiant flame afflicting them, ending the effect.
At higher levels: When you cast this spell with a slot of 4th level or higher, the damage increases by 1d6 for each slot level higher than 3rd.