This is a ceremonial magic ritual text by Aleister Crowley, writing under his magical name "Therion" (The Great Beast), composed around 1916–17 in the Thelemic occult tradition. It prescribes a step-by-step working called *Stauros Batrachou* ("Cross of the Frog") for capturing and binding a Mercurial familiar spirit, using a live frog as the operative instrument.
The ritual's distinctive and provocative structure systematically inverts Christian sacramental rites: the frog is first baptized in the name of Jesus, then venerated, then subjected to a mock trial in which Crowley denounces Christ as the "slave-god" responsible for suppressing pleasure and freedom, and finally crucified, stabbed, and partly consumed as a sacrament. The central argument is explicitly anti-Christian and Thelemic — the working declares the Christian aeon ended and the "Age of Horus" begun, and frames the magician's dominance over the frog-as-Jesus as a cosmic act of liberation.
What makes the text distinctive is its layering of genuine grimoire convention (the ark, the offering of gold and frankincense, the dagger, the eating of the sacrifice) with pointed theological polemic, turning what might read as standard folk magic into a worked-out doctrinal statement about the supersession of Christianity. Readers coming to it for occult history, Thelema scholarship, or the study of ceremonial magic will find it characteristic Crowley — theatrically blasphemous, ritually detailed, and self-consciously mythological in scale.