Vulkohm's Voltaic Whip

A tendril of electricity extends from your hand into a coiled whip. As a part of casting this spell and as an action on each subsequent turn until the spell ends, you can crack the whip at one creature you can see within 30 feet of you. Make a ranged spell attack, dealing 3d10 lightning damage on a hit.

At Higher Levels. When you cast this spell using a spell slot of 4rd level or higher, the damage increases by 1d10 for each slot level above 3rd.