Homebrew
Cacophony of Shadows
1-level Evocation
Casting Time: 1 action
Range/Area: 30ft
Components: V, S, M
Materials: (a vial of shadow essence)
Duration: Instantaneous
You unleash a burst of shadows that envelop creatures in the area. Each creature in a 15-foot cone must make a Wisdom saving throw (DC 14) or take 3d6 necrotic damage. On a successful save, the damage is halved. However, the shadows cling to the caster's mind, causing unsettling whispers. After casting this spell, the caster has disadvantage on Wisdom saving throws for the next hour.
At higher levels: Add 1d6 per level above 1st.