6th-Level Necromancy
Negative energy ripples out in a 60-foot-radius Sphere from a point you choose within range. Each creature in that area makes a Constitution saving throw, taking 8d8 Necrotic damage on a failed save or half as much damage on a successful one.
The damage increases by 2d8 for each spell slot level above 6.
Player's Handbook (2024), p. 250