The mercurial angels of the deep were meant from the beginning to lead a lonely existence, close enough to inspire human hearts, yet eternally out of reach. The Lore of Longing, with its power to enflame human hearts, was the core of the House's collected wisdom, but mastery of wind and wave also led to the evolution of the Lore of Storms, allowing the angels of the deep to reach far over dry land as well. Ironically, once the Lammasu had forsaken their oath to heaven and were able to show themselves openly to mankind, the rebels found themselves ill-equipped to relate directly with humanity. They were far more comfortable showing men and women the faces that they wanted to see rather than risk being viewed for what they truly were. Therefore, these mutable spirits refined the art of transforming their appearance at will to suit the expectations of those around them, and the Lore of Transfiguration emerged.