Satan Pit" (2006), the Tenth Doctor states that his people "practically invented black holes. Well, in fact, they did." Both the Beast (in "The Satan Pit") and the Doctor (in "The Sound of Drums" and "The Doctor's Wife", 2011) believe the Doctor ended the War by killing all of the Time Lords and many of the Daleks. The Tenth Doctor's artificially created "daughter" Jenny is speculated by Donna Noble in "The Doctor's Daughter" (2008) to be a surviving Time Lord, though the Doctor initially rejects the suggestion. Two other Time Lord-like beings appeared in "Journey's End" (2008): Donna, briefly empowered with the mind and knowledge of a Time Lord, and a half-human clone of the Tenth Doctor. Donna's memories related to the Doctor, as well as her Time Lord knowledge, are buried in order to save her life, while the clone lives out his existence in a parallel universe with Rose Tyler. "The End of Time" (2009–10) shows the High Council of Time Lords, led by Lord President Rassilon, attempting to escape the Time War by materialising Gallifrey in the place of Earth at Christmas. However, the Tenth Doctor destroys the device which allows their passage into the present, sending them back into the events of the Time War. During the episode "The Doctor's Wife" it is revealed that several Time Lords and their TARDISes had been trapped and destroyed by an entity called House who lived in a separate bubble universe. In "A Good Man Goes to War" (2011), it is revealed that the daughter of Amy Pond and Rory Williams, Melody Pond (who later goes by her transliterated name "River Song"), has been born with Time Lord-like genetic traits. An old acquaintance of the Doctor's, Madame Vastra, reminds the Doctor that the Time Lord race developed due to their billions of years' exposure to the time vortex. The Doctor then recalls that Rory and Amy had spent their wedding night in the TARDIS; therefore it is theorised by Vastra that River's conception mirrored that of the Time Lords' genesis and therefore she herself developed Time Lord genetic characteristics. In "The Night of the Doctor" (2013), it is shown that the Eighth Doctor regenerates into the War Doctor to fight in the Time War. Many years later, as shown during "The Day of the Doctor" (2013) and also described by the Partisan in "The End of Time", the War