Circle of Death

6th-level necromancy
Casting Time:1 action
Range:150 feet
Components:V, S, M (the powder of a crushed black pearl worth at least 500 gp)
Duration:Instantaneous

A sphere of negative energy ripples out in a 60-footradius sphere from a point within range. Each creature in that area must make a Constitution saving throw. A target takes 8d6 necrotic damage on a failed save, or half as much damage on a successful one.

At Higher Levels.When you cast this spell using a spell slot of 7th level or higher, the damage increases by 2d6 for each slot level above 6th.