Sound of Despair

You point at a spot within range. A ghostly bell appears and starts ringing. Any creature within the radius of the bell must make a Fortitude save against your CHA CL. or take 2 D8+ your Magicka in Necrotic damage.
If this spell is cast again in the same combat, the damage is increased by the amount of D8s, equal to the amount of rounds that have passed since the first casting.