The Doctor's reality (Death Comes to Time)

In one version of reality, the Seventh Doctor became the "last of the friendly Time Lords" and ultimately seemingly sacrificed himself in a final stand near Stonehenge to defeat a rogue Time Lord known as Tannis. In his absence, Ace, who had undergone training with the Doctor's old friend Casmus, was officially made the new Time Lord by the Kingmaker while the Minister, despite having lost his status as a Time Lord, continued to travel in the universe using the formula for doors.

When exposed to anti-time, the Eighth Doctor of the positive-time universe saw a reality where the Time Lords had "terrible mind powers", (AUDIO: Zagreus) matching the mysterious powers which, in this account, Time Lords were said to inherently possess as "Gods of the Fourth" despite being sworn never to use them. (WC: Death Comes to Time) According to one account, in the post-War universe of the Eighth Doctor, Tannis was a threat Gallifrey had yet to face, seemingly establishing the events involving the Seventh Doctor as a different timeline from his, (PROSE: The Gallifrey Chronicles) though another account dealing with this same version of the Eighth Doctor acknowledged the Canisian invasion. (PROSE: Trading Futures) As the Seventh Doctor invoked his power as a "God of the Fourth" to destroy himself and Tannis, Tannis desperately cried out that the Doctor's actions would "disrupt the course of time", which the Doctor did not deny. (WC: Death Comes to Time)