Elysian

The Elysians were a secret sect within the Time Lords.

They were actually clones created from the Time Lord Academy dropout Xanti who was the son of Uriel and were created secretly by Overseer Luther. These clones were part of a plan by Luther to take the Watchtower and rewrite history turning himself into a god that ruled Gallifrey. This led to Xanti discovering that he was being stalked by the Elysians and he believed that only the The Doctor could save him. Just as The Doctor arrived, the Elysians teleported in and tried to kill him but the Matrix agent Shayde saved him who gunned down one of the assassins. However, the others managed to escape with Xanti and Izzy Sinclair.

It was later discovered by the doctor that the captive Elysian was a clone of Xanti and through Uriel they learnt of the Final Chapter. Later, when Xanti was placed in the Watchtower by Luther as part of his plans to become the supreme ruler of a militaristic Gallifrey but through Xanti's link with his clones he managed to turn the Elysians against Luther thus ending his threat to the universe. (DWM: The Final Chapter)