Princess Celestia young and foolish had commited a grave error. Long ago to create her empire she tried to eliminate any threat and gain any power she could to protect her kingdom. In one such gambit she tried to recruit the King of Storms. An alicorn with full control over the weather when he fought back she ended him with the elements of harmony. In doing so she lost the power setting it free as a ghost that none should summon the storm. The king however put a spell on his power making it seek a new host with one condition, the host could not be equine.