Basim Ibn Ishaq (born 835) is a human reincarnation of the Isu Loki who used Yggdrasil to permit his consciousness to survive the Great Catastrophe millennia ago. Born in the Abbasid Caliphate during the 9th century, Basim was originally a street thief until being recruited to the Hidden Ones by the Master Roshan, who then became his mentor. Operating primarily in foreign nations on the Hidden Ones' behalf, Basim quickly rose through their ranks thanks to his skills and would eventually attain the rank of Master Assassin himself, as well as become the leader of the bureau of Constantinople. At some point, Basim took the fellow Hidden One Hytham as his apprentice, who would thereafter accompany him on his travels.