Bolt Burst

Bolts of electricity arc outward from you. Each creature in a 15-foot cube originating from you must make a Dexterity saving throw. On a failed save, a creature takes 2d8 lightning damage, and it can't take reactions until the start of its next turn. On a successful save, the creature takes half as much damage, but suffers no other effect.

Creatures wearing armor made of metal have disadvantage on the saving throw.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.