A magical organization is an organization put up for the furtherance of its members by use of magic or to further the knowledge of magic among its members. This is a collective name of hermetical orders, Wicca circles, esoteric societies, arcane colleges, witches' covens and innumerable other such organizatorial names.
Some very famous magical organizations exist, such as:
... has eight cases: nominative, vocative, accusative, instrumental[?], dative, ablative, genitive, and locative. It has over ten noun declensions.
Sanskrit has ten classes ...