Bone Wall

A swirling mass of bones made of dark shadows swirls from you in an aura with a 15-foot radius. Until the spell ends, the aura moves with you, centered on you. You gain resistance to slashing and bludgeoning damage when concentrating on the aura. Each creature that enters the spell’s area for the first time on a turn or starts its turn there, must make a Wisdom saving throw. It takes 3d10 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 5 level or higher, the damage increases by 1d10 for each slot level above 4.