Spell Level: 6
Spell School: Necromancy
Casting Time: 1 Action
Components: V, S, M (the powder of a crushed black pearl worth 500+ GP)
Range: 150 ft.
Area: 60 ft. Cube
Duration: Instantaneous
Conditions/Effects: Damage (Necrotic)
Saving Throw: Constitution
Ritual: No
Scaling: Spell Slot Level
Classes: Sorcerer, Warlock, Wizard
Link: Link to source
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.
Using a Higher-Level Spell Slot. The damage increases by 2d8 for each spell slot level above 6.