Negative Energy Flood

5th-Level Necromancy
Casting Time: 1 action
Range: 60 feet
Components: VM (a broken bone and a square of black silk)
Duration: Instantaneous

As in Xanathar's Guide to Everything except base damage/temp HP roll has been increased to 6d12 from 5d12 and the following has been added:
At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage and temporary HP die increase by 1d12 for each slot level above 5th.

Source: XGE 163

Changelog