Black Sun

A dark glow flashes from your pointing finger forming into a sphere becoming darker and darker absorbing all the light around it causing it to seem almost as if the sun has been turned off. the sphere gets bigger and bigger until you release it to a point you choose within range it then rushes in a flash of moves to instantly hit the target exploding sinking everything into a shadow. Each creature besides you in a 120-foot-radius sphere centered on that point must make a Dexterity saving throw with disadvantage. A target takes 9d10+9 necromancy  damage on a failed save, or half as much damage on a successful one.

The shadow makes it seem as if the light is out covering an area as in complete magical darkness however the caster can see perfectly fine throuh it as well as any creature with dark or true vision but everything inside is coverd with this liquid shadow. If a non construcct or undead starts its turn in this shadow they take 1+your proficiancy bonus necrotic damage. Each non contrunct or undead has disatvantage on all death saving throws as well as any roll requiering constitution. The shadow lasts for rounds equiel to your proficincy bonus

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the damage increases by 2d10+3 for each slot level above 7rd and double the radius effected each time.