Evanara's Malevolent Perturbation

Sparks start to jump across the ground as you build up energy of the weave in a 20ft radius centred on a point within range. The energy erupts; sending damaging magical feedback through those caught in the area. Creatures within the area must make an Intelligence saving throw. On a failed save, the creature takes 3d6 Lightning damage, and is unable to cast spells until the start of your next turn. On success the creature takes half damage and suffers no other effects.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.