Unraveling Lash

You conjure a whip of violet energy laced with Mystrite runes. Make a melee spell attack: on hit, deal 6d6 force damage. If the target is concentrating on a spell, they have disadvantage on saving throws made to maintain concentration. If the target loses concentration as a result of this spell, you gain temporary HP equal to half of the damage dealt.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, increase the damage by 1d6 per level.