The notion of ritual efficacy has a long history in both the discipline of anthropology and in the context of Tibetan civilization. One need only look as far as Evans-Pritchard’sWitchcraft,Oracles and Magic Among the Azande(1976) or Lévi-Strauss’s seminal insights in ‘The Sorcerer and His Magic’ (1967) to understand the salience of inquiry into the ways meaning is made through ritualized action, and by which cure - or other types of biosocial transformation - is attained. In medical anthropology, a more general concern with what is meant by the term ‘efficacy’ across biomedical and non-Western medical praxes has