Arcing Bonds

Lightning arcs from you to up to three creatures of your choice that you can see within range, creating an electrical bond between you and each target.  A bond is broken if a target is ever outside the spell's range.  At the start of a bonded creature's turn, it must make a Constitution saving throw.  The creature takes 3d8 lightning damage on a failed save, or half  as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 2nd.