Disciples of Saxon

The Disciples of Saxon were a sinister cult who worshipped The Master. It is believed they were formed during the era of The Sound of Drums and Last of the Time Lords, then went on to resurrect The Master in The End of Time with the Potion of Life. He had prepared them to do so should he be killed. In the end of Last of the Time Lords, a hand can be seen collecting The Master's ring which was in fact a hand belonging to a member of the Disciples of Saxon.

The resurrection went wrong, however, because Lucy Saxon's family had calculated an opposing potion to the potions of life, in preparations for his predicted return. Lucy used it and sacrificed herself, blowing up Broadfell Prison. She along with all The Disciples of Saxon were killed, though The Master still survived.