The book explores transformations of the apocalyptic figure of the Antichrist in various post-Soviet discourses, including ecclesiastical and political writings, conspiracy theories, and literary texts. Drawing on the extensive research into diverse materials published in the Russian Federation after the collapse of the Soviet Union, it demonstrates how an initially religious idea has penetrated secular discourses and what implications this entails. By applying the innovative analytical category of ideomyth, the book successfully answers the question of how and why the figure of the Antichrist is employed within the Russian post-Soviet semiosphere, with a special focus on texts that emerged within nationalist and religious milieus.