Arc Flash

Extend your hand and an arc of raw electrical energy travels from your hand to a creature or target within range. Make a ranged spell attack against the target. On a hit the target must make a dexterity save. On a fail the target takes full 1d12 lightning damage, on a success the target takes half as much.

This spell's damage increases by 1d12 when you reach 5th level (2d12), 11th level (3d12), and 17th level (4d12).