Death's Embrace

You conjure dark hands of shadow to envelop one creature. If the target attacks you or willingly moves at least 5 feet, it must make a Constitution saving throw. A target takes 3d8 necrotic 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 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.