Circle of Death

A sphere of negative energy ripples out in a 60-foot radius 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.

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.

*The powder of a crushed black pearl worth at least 500 gp.