Bone Shield

Using the bones from a corpse within sight, you tear and grind them out to form a shield around your form. While the shield holds and you receive damage from any source except Radiant or a Critical Hit, roll 1d6 and subtract the rolled amount from damage taken. If the damage is received within 5ft, deal 1d6 necrotic damage to attacker.  

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, both the damage reduction and the necrotic damage increase by 1d6 for each slot.