Bone Barrier

The caster makes hand gestures and speaks words over a corpse or the collected bones of a dead creature.  The bones then fly up and spin around the caster, acting as a shield, giving 2d6 temporary hit points for the duration.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the temporary hit point total increases by 1d6 for each slot level above 2nd.