Christofi Warp Drive

The Christofi Warp Drive was a warp drive built into the Elysium.

When the group of humans lead by the army used a vortex manipulator to travel back to the Elysium in the 21st century, the humans used the artron energy that had been imbued in them after using the manipulator to power the Christofi Warp Drive and merge a group of advancing Weeping Angels into the walls. (STAGE: The Crash of the Elysium)

Behind the scenes

 * The Christofi Warp Drive shares a name with Daryl Christofi, a webmaster of a fictitious blog entitled Daryl the Diver created to promote The Crash of the Elysium. However, no in-universe reason was given for the shared name.
 * A voice announcing the activation of the Christofi Warp Drive was heard in a behind the scenes video released by the BBC for The Crash of the Elysium.