Arcing Orbs

As an action, you create two orbs of lightning energy that each must remain within 60 feet of you and 30 feet of each other. When you cast the spell and on each subsequent turn as a bonus action you may create a 5 foot wide arc between the two orbs in a straight line. Any creature within the arc's line must succeed on a DEX saving throw or take 4d8 lightning damage or half as much on a success. The damage increases to 5d8 if the creature is wearing metal armor. As part of the bonus action you may move one of the orbs up to 15 feet.

At Higher Levels. For each level above 5th that you cast this spell, the distance apart that the orbs can be increases by 10 feet.