Astral Flame

Astral Flame manifests into holyfire, Witherfire or hellfire using ashes of the fires from those planes.

You choose the type of fire that will emanate from you in a 30ft cone and each creature in that area excluding you must make a Dexterity saving throw.

On a failed save the target takes 6d6 Radiant, Fire or Necrotic damage. and is inflicted with Ignited. On a successful save, the target takes half damage and isn't ignited.

The fire spreads around corners. It ignites flammable objects in the area that aren't being worn or carried.

Ignited: The creature cannot heal and, When the creature is attacked, it gets dealt an additional 1d6 damage of the chosen flame. Lasts until the end of your next turn.

 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.