Thunderstruck

You call down a bolt of lightning from above that strikes you, and travels through the ground and arcs into creatures within range. Each creature in a 15-foot Emanation originating from you must succeed on a Dexterity saving throw, taking 3d8 Lightning damage on a failed save or half as much on on a successful one. On a failed save, the creature loses their reaction until the end of your next turn.

The spell’s thunderous sound can be heard up to 100 feet away.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 3.