The Sefer Yezirah text is Judaism's pivotal thamaturgic handbook for man playing God. The notes to BT Sanhedrin 65b in the Soncino edition state that hte rabbis' magical act of creating the calf "does not come under the ban of witchcraft (because) the Creation was accomplished by means of the power inherent in...mystic combinations of the Divine Name." While this Talmud reference to the rabbinic creation of life is obscure, another rabbinic act of creation using Kabbalistic combinations of the letters of the "Divine Name" is better known, if not notorious. This is the "golem," dead matter supposed to have been brought to life as a gentile-killing avenger. Kabbalistic legend has this occuring in the Bohemian capital city of Prague circa 1586, thorugh the power of Rabbi Judah Loew, by means of a Kabbalistic amulet he fashioned containing magical letters.
—Michael Hoffman, Judaism Discovered, 2008, pg. 802, The Golem of Prague