Black Sun

A small black ball of flame shoots from your hand to the target area and explodes into a black inferno pulling in the surrounding air. The flames burn hotter than the surface of the sun and ignore resistances and treat immunities as a resistance . All creatures within a 30-foot-radius must make a Dexterity saving throw. Targets take 10d6 damage on a failed save, or half as much damage on a successful save.

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.