The Satanic community has historically been plagued by division and conflict. Segregated along theological lines, Satanism as a whole has suffered a crisis of identity in the modern era. Without any kind of real central organizational structure representative of all Satanic beliefs, questions have begun to arise even within the Satanic community itself regarding Satanic practice. What is Satanism? What does it mean to be Satanic? Can these questions even be answered without falling back on subjective opinion and personal experience? In this pivotal work, Martin McGreggor explores the answers to these questions from a cross-cultural and non-denominational perspective, creating a Satanic ethos that remains relevant across cultural, religious, and even Satanic lines. The author presents a mature and nuanced Satanic belief architecture, the result of over fifteen years of active Left Hand Path practice. Covers the theory behind Satanism, and also the ethics and practices that make up its actual application.