The Ten Sages(十聖Jū Sei) are the leaders of the Mage's Guild. Their headquarters is on the island of Magister's City: Ishana. All the members are named after the numbers 1-10. In the Phase Shift novels, they are named after the first ten English numbers, while in XBlaze – Code: Embryo they are named after the first ten German numbers. Six of the Phase Shift era Saints are known and only four of the Sages are known in the XBlaze era. Nine is their most notable member. The ten seats of the Ten Sages have never been full.