The Emperor's New Cape

The Emperor's New Cape is a Level 51 quality Cloak that improves Agility, Stamina and Critical Strike.

Source
This item drops from Emperor Dagran Thaurissan in Blackrock Depths.

Trivia

 * This cape has an invisible model, referencing the Hans Christian Andersen tale, The Emperor's New Clothes. In this fairy tale, two tailors convince the emperor that they have expensive cloth that only the wisest people can see. The Emperor is afraid to admit that he sees nothing, and "dresses" himself in nothing for a parade.