Storm of Radiance

Level 5 Evocation (Warlock, Wizard)

Casting Time: Action
Range: 120 feet
Components: V, S, M (a pinch of phosphorus)
Duration: Concentration, up to 1 minute

You unleash a storm of flashing light and raging thunder in a 10 feet radius, 40 feet high Cylinder centered on a point you can see within range. While in this area, creatures have the Blinded and Deafened conditions, and they can’t cast spells with a Verbal component.

When the storm appears, each creature in it makes a Constitution saving throw, taking 2d10 Radiant damage and 2d10 Thunder damage on a failed save or half as much damage on a successful one. A creature also makes this save when it enters the spell’s area for the first time on a turn or ends its turn there. A creature makes this save only once per turn.

Using a Higher-Level Spell Slot. The Radiant and Thunder damage increase by 1d10 for each spell slot level above 5.