Crackle

Lightning emerges around a creature within range. The target must make a Dexterity saving throw. On a failed save, the target takes 1d8 lightning damage, and it can't take reactions until the start of its next turn. The target has disadvantage on its save if is wearing armor made of metal.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).