Arc Tempest

When you cast this spell, and as a bonus action on each of your subsequent turns, you may teleport to an unoccupied space within 40ft of you. If you do, you create a 20ft spherical blast of electricity centered on you when you get to your destination. Each creature other than you that is caught in the blast must make a Dexterity saving throw. A target takes 6d4 lightning damage on a failed save, or half as much damage on a successful one. The electricity spreads around corners.