The Wizard Saints or also known has the Great Kings of Albion, Great Kings of Isghar (Ranks 4-1) is one of the 2 highest ranks in the Magic Council alongside the Headmaster, and is seen has the most powerful Magi in the entire magical world. Only 10 Magi is capable of becoming Wizard Saints.
The Wizard Saints was formed by 10 extremely powerful Magi, including the legendary wizard, Emrys who founded the Magic Council.
The Wizard Saints are seen has so immensely powerful, they are known through the magical world even the non-magical world. In fact, some say if 2 the the Saints were to clash, it would cause the Apocalypse, but its been proven that each power is on different levels. Has shown with Samuel and the 1st rank Wizard Saint who was able to defeat Samuel with such ease, it looked like Samuel was a tiny doll for a child.