Arcane Protection Shield

This magical coin attaches to your armor or body (your choice) when you attune to it and reshapes into an arcane brand featuring a shield. Upon finishing a short rest, the brand grants you 2d4 + 2 temporary hit points as it forms a thin barrier of protection along your body that can potentially absorb the impact of any incoming attacks.  

Notes: Bonus: Temporary Hit Points, Humanoid, Warding