Rafael's Magic Poncho

Casting Time: Action - Range: Self - Components: V, S - Duration: 1 hour
You gain 5 temporary hit points for the duration. If a creature hits you with a melee attack while you have these hit points choose randomly an elemental damage type (fire, lightning, cold, acid) it takes 5 damage of that type. At higher levels both the temporary hit points and the damage increase by 5 for each slot level above 1st.