The Seven Cities Rebellion, or Whirlwind, was the name of the rebellion led by Sha'ik on the continent of Seven Cities. Dryjhna was the term in the Seven Cities (Bisbrha and Debrahl) language for the Apocalypse.
Followers of the Whirlwind were said to follow the Whirlwind Goddess, a mysterious ascendant of unknown origin to the humans who lived on the continent. It was aptly named, as demonstrated when Sha'ik Reborn opened a magical book, releasing a giant whirlwind that surrounded the rebel's home base, the holy desert of Raraku. The Whirlwind was said to be the rage of the goddess amongst the Seven Cities natives, though this is a slight twist on the truth.