Cloud Tower is a boarding school for witches and the most prestigious educational institution for Witches. At Cloud Tower, witches learn about witchcraft. It is the magical competitor and rival of Alfea. Its headmistress is Headmistress Griffin. The campus itself is a huge and vast living organism that had been created in ancient times by powerful witches. A magical energy circulates through the school, as blood in a body.
Cloud Tower School for Witches is proud to have turned out some of the most evil witches in the universe. With a stellar offering courses in Mayhem, Hexes, and several levels of Advanced Evil, Cloud Tower is the pinnacle of education in the dark arts.
Cloud Tower is hard to enter, as there is a defense field surrounding it. There are ways of getting past this defense, however: tunnels that connect the schools, ways to get past the field itself, and one may enter if one is invited, for example, Valtor transforming into a stag chased by wolves (who are actually the Trix). Along with that, the tower can be manipulated like a high tech confusion device by the one who is able to control it. This twists the building into forming new corridors or passages to confuse all those inside.