Anathenti

Anathenti, the "Queen of the Witches", is an ancient, legendary monarch whose spirit is stored within the Crown of Anathenti.

History
According to Wulf Orden, Anathenti held the title of Queen of the Witches approximately 2.6 million years ago (which would mean that her reign predated the formation of the BZPB Multiverse). Her essence/spirit began to inhabit the Crown of Anathenti and she created a battle royale tournament named the War for the Crown. Every 10,000 years, the spirit of Anathenti would invite magic users from all over the universe to the tournament for the chance to claim her crown for themselves. The last magician standing would then have to defeat the spirit of Anathenti to win the tournament. The War for the Crown was only ever won once in recorded history, in approximately 20,000 CMT.

Asabana commented that it would not be easy to defeat Anathenti, because Anathenti "kills and curses like nobody's business", and that "even some modern mages [had not] been able to gather enough accumulated knowledge to break her most powerful curses". Wulf added that Anathenti had even found a way to unlock the power of Sepulchritude, but he hoped to win the War for the Crown regardless.