User:MrThermomanPreacher/Gallifrey's history (The Day of the Doctor)

When the Moment manouvered the Tenth, Eleventh, and War Doctors into saving Gallifrey at the end of Last Great Time War, the Tenth Doctor believed they were changing history, (TV: The Day of the Doctor) with some other accounts concurring a new history was created in which Gallifrey survived. (PROSE: Big Bang Generation, Dalek Combat Training Manual, COMIC: The Good Companion) Other accounts suggested this was not a change to the timeline at all, which would mean Gallifrey had in fact always been saved and that the Doctor simply had been unable to remember it. (PROSE: The Day of the Doctor, et. al)

Origins
For a long time following the Last Great Time War, it was believed that the Doctor destroyed both the Time Lords and the Daleks. From the projections of the Matrix, the Time War-era Time Lords were themselves aware of this then theoretical future as recorded in the Dalek Combat Training Manual, however, they noted that this "version of history" would be "revised" as the War Doctor joined with his incarnations both preceeding and following the Time War to save the planet Gallifrey by relocating it to a pocket universe. (PROSE: Dalek Combat Training Manual)

By some dissenting accounts, the Eighth Doctor, rather then regenerating into the War Doctor on Karn, (TV: The Night of the Doctor) had survived to the end of the Time War to destroy Gallifrey. (PROSE: Doctor Who and the Time War, COMIC: The Forgotten) Prior to the end of the War, the Eighth Doctor tried to regain the Great Key of Rassilon, (COMIC: The Forgotten) which had been missing since before Rassilon's presidency. (AUDIO: Desperate Measures) He found the forces keeping the Key and was imprisoned by them for a month. He overpowered the guards with the help of Chantir and escaped with the Key. The Doctor planned to use the Key to replicate the De-mat Gun and then modify the gun so that instead of removing only one individual from time and space, it would remove millions. (COMIC: The Forgotten) By one account, this modified De-mat gun was the Moment, (COMIC: Don't Step on the Grass) the weapon in the Doctor's possession on the last day of the Time War which could "destroy Daleks and Time Lords alike". (TV: The End of Time) The Eighth Doctor experienced a memory wipe shortly after obtaining the Key, which the Tenth Doctor attributed to using the modified De-mat Gun. (COMIC: The Forgotten) The Tenth Doctor and the Advocate believed that the Doctor used the Great Key to activate the Moment, time locking the war (COMIC: Don't Step on the Grass) and "doom[ing] them all". (COMIC: The Forgotten)

Predicted as "the final event" by the Deathsmiths of Goth and Bettan, another account held that the Moment was a weapon, which begged to be used, chained to an N-Form. As the Doctor prepared to pull the handle on the last extrusion of the Moment within his reality, Daleks and Time Lords alike screamed for him to not use the weapon, although they were too far away to stop him as he stood atop a wooden platform, itself connected to Morbius's Red Capitol and Yarvelling's Church, on a backwater filled with the wreckage of a thousand planets, including Skaro, Gallifrey, and the Earth. Before she crumbled to dust before him, the Doctor's saviour's "final song" told him of how he would have "a whole new body to expiate the guilt" and gave him a kiss, which secretly passed the Restoration to him so he could regenerate after the War, though he failed to understand what she meant.

After watching her die, the Doctor, taking a moment to look down at the broken fragments of the War below him, activated the Moment after deciding he needed no last words. With that, the War ended and the universe had a chance to sing in victory; Gallifrey Original and the Dalek warships around it burst into flames, and a time lock sealed the conflict away from reality. Either saved or damned by the shadow of the Moment, the Doctor, meanwhile, was left to fall away from the destruction into plasmaspace, then foulspace, and then beyond into whatever came next, only to be saved by his TARDIS. While he figured he would die after the Moment had fixed his existance, his saviour's kiss allowed him to regenerate into a ninth incarnation, leaving the Doctor to shout out his last words and regenerate with "a curious new gold". (PROSE: Doctor Who and the Time War)

Existence
The Twelfth Doctor believed that, in creating this new history, he had changed the future for countless people and planets. (PROSE: Big Bang Generation)

In this new history, the Time Lords returned to the rebooted universe. (PROSE: Dalek Combat Training Manual) They made some changes to history upon their arrival, restoring much of the pre-Time War universe which had been overwritten by the war, including the changes to Voord history. (COMIC: Four Doctors)