Activation: first, commit an Evil act. The Roman Catholic Church’s definition of mortal sin will work, in this context: the act must be one of unquestioned and serious evil; the person committing the act must be fully aware that it is evil; and then he or she must commit the act anyway. This is admittedly subjective, and the usual instructions on how to perform the Sortitio Doloris are notoriously unhelpful on how to properly calibrate one’s Evil for this ritual. If it doesn’t work, then go out and commit another Evil act. No exceptions.