This counter-curse supposedly counteracted the Transmogrifian Torture, a curse that causes death in a similar manner to petrification. Gilderoy Lockhart claimed to have known this spell, lamenting that he could have saved Mrs Norris's life were he present at the time of her attack on 31 October, 1992. However, Mrs Norris was not actually killed at all, but rather petrified by the Serpent of Slytherin, and, given that Lockhart made his career stealing the accomplishments of other wizardkind, it is unlikely he knew this counter-curse in the first place.