Before that, he was once the Great Harlequin of the Masque of the Shadow Weavers. During that time, Lathrangil would discover that the Talaihin Reavers were being beaten back by the Imperial defenders of the world the Aeldari Corsairs had invaded. The Great Harlequin then appeared to their Corsair Prince, Sathbuinn Surefire, and offered the Shadow Weaver's aid. Sunfire accepted their help and the Masque immediately launched an assault that destroyed the Imperial forces, with Lathrangil personally killing the Imperial commander. Sometime later, he left the Shadow Weavers and became a Harlequin Solitaire.