Regeneration Codex

The Regeneration Codex was able to activate a long-forgotten stellar manipulator (AUDIO: The Satanic Mill) and was stored inside the Urn of Rassilon in Alcove 5-Δ-7-9 of the Omega Vault, its purpose, according to Padrac, shrouded in mystery.

The Eleven left Gallifrey with it in a stolen TARDIS (AUDIO: The Eleven) and used it to locate and activate the stellar manipulator. To begin its destruction of the Sun, he inserted the Regeneration Codex into the mouth of Father Locke, an automaton. (AUDIO: The Satanic Mill)