Vivisection is the act of operating on a living organism. Mages perform vivisections on monsters and animals in an effort to expand their knowledge of anatomy. The subject must always be strongly fastened to the operating table as anesthesia is not generally used during the procedure.
Those who examine young women who might have been affected by the Curse of the Black Sun often employ vivisection. It is the only procedure that allows one to determine with certainty if someone is a mutant and thus may be a dangerous beast.