Electric Missile

You send and arc of lighting hurling at an enemy in range. Make a ranged spell attack. On a hit the target takes 1d8 lighting damage. You can cause smaller bolts to leap from the target to a different creature of your choice that you can see within 5 feet wielding a metal weapon or wearing metal armor. The second creature takes 1d4 lighting damage.

This spell's damage increases by 1d8 and 1d4 when you reach 5th level (2d8 and 2d4), 11th level (3d8 and 3d4), and 17th level (4d8 and 4d4).