Amoranth’s Soul Rend

Choose an area with a 30 foot radius within range. Within that area, up to 6 creatures that you can see within that radius must make a constitution saving throw. Upon a failure, the creature takes 6d6 necrotic damage, as well as an additional 3d6 damage at the end of their next turn. Upon a success, the creature takes only half of the initial damage and no additional damage. 

At Higher Levels. When this spell is casted at 5th level or higher, the immediate damage increases by 1d6.