A vertical column of black fire erupts from the ground in a location you specify.
Each creature in a 10-foot radius, 30-foot-high cylinder centered on a point within range must make a Dexterity saving throw.
A creature takes 4d8 fire + 4d8 necrotic damage on a failed save, or half as much damage on a successful one.
Additionally, on a fail, their hit point maximum is reduced by an amount equal to the necrotic damage taken. This reduction lasts until the target finishes a long rest.
The black fire spreads around corners. It ignites flammable objects and rots plants in the area that aren’t being worn or carried.