Thorny Bones

A disturbing force surrounds a willing creature within range, seeping into their skin and merging with their bones. Large, painful thorns of bone immediately protrude from the creatures skin. They gain +2 AC for the duration and take 1d6 piercing damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher increase the AC bonus by +1 and damage taken by 1d6 for each slot above 1st.