The Slayer of Satyrs

The World is the same as ours, but instead of rome falling historically, it collapses as magical portals appear and dispenses magical creatures. Then the portals disappear. This story takes place a long while after, in Albion (Modern day Britain), we follow a man who joins the Dark Order, one of many religious orders in this world. The book is the story of his life and every thing he accomplishes.