Tycon assured the Archbishop that Centurion Zenon had a chance to survive. When she asked for the methods, Tycon chose to keep most of the information private. He did have to promise the woman that the power source was spiritual in nature-- specifically not necromantic or void-borne.
Because of Tanamar's open rejection of dwarf Harkus, Natalya explained in full... In doing so, she chose to ignore the complaints of both of them. The woman did as she pleased... which was probably what made her so difficult to deal with.