Elfrida Clagg was Chief of the Wizards' Council a century after Barberus Bragge, succeeding Burdock Muldoon. Due to the declining numbers of Golden Snidgets, Clagg made them a protected species, and outlawed both the hunting of them, and their use in the game of Quidditch.
Clagg also attempted to redefine the classification of Beings and Beasts by declaring that all those magical creatures that could speak the Human tongue were Beings. However, this caused problems as the Trolls were again classified as Beings and destroyed the meeting chamber, Jarveys were in attendance, and the Centaurs boycotted the meeting as the Merpeople were not invited.