Armour of Doragmorith

A protective magical fire cloaks you, manifesting as a spectral green fire that covers you and your gear. You gain 1d8 temporary hitpoints for the duration. If a creature hits you with a melee attack while you have these hit points, the creature takes 2d4 fire damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the temporary hit points increase by 1d8 and the fire damage increase by 1d4 for each slot.