Armour of Asmodeus

A protective magical force surrounds you, manifesting as a hellish flame that covers you and your gear. You gain 1d6 + your spell casting modifier temporary hit points for the duration. If a creature hits you with a melee attack while you have these hit points, the creature takes 2d10 fire damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, both the temporary hit points increase by 1d6, and your damage goes up by 1d10 fire damage.