Vandenhelt's Violet Cone

A blast of barely visible light shines from your hands. Each creature in a 60-foot cone must make a Dexterity saving throw. A creature is blinded for five turns, takes 5d8 necrotic damage on a failed save, or half as much damage, and is not blinded on a successful one.

Creatures who fail their saving throw must make a constitutional saving throw with advantage to avoid becoming diseased with skin deterioration.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 3rd.