Hyper-Radiant Flame Reflector

The Hyper-Radiant Flame Reflector can be used to reflect fire-based magic back at the caster. Even when the trinket isn't activated, it still provides the fire resistance.

Source
The Hyper-Radiant Flame Reflector is crafted by Engineers with a skill level of 290.

The drops off Solakar Flamewreath in Upper Blackrock Spire.

Background
The hyper-radiant flame deflector is an advanced, heavier version of the basic flame deflector. The device entirely encloses the head and neck, wraps around the shoulders, and extends down the arms and chest. The improved refrigeration units within provide enhanced protection against fire-based attacks and can even reflect magical ones back upon the caster.