Barusa's universe

In one of the infinite parallel universes of "possible space", (COMIC: Fire and Brimstone) the history of the Doctor was recorded by his grandfather and companion, the Time Lord Cardinal Barusa. (PROSE: The Chronicles of Doctor Who?)

In this universe, the Daleks had a spider-like appearance which exposed their mutant form, which was insectoid but also more recognisably humanoid than the Dalek mutants of the Eighth Doctor's universe. (COMIC: Fire and Brimstone) The Time Lords of this universe had a shorter history leading up to the Doctor's era, with it only having been a few millennia since Rassilon's day. They also had somewhat different biology: they only had twelve incarnations, with their twelfth and final regeneration sparking not a change in appearance, but the release of the soul from the body, to inhabit the "resonating crystals" of the Domed City of Gallifrey. This was a form of immortality. (PROSE: The Chronicles of Doctor Who?)

This universe intersected with the Eighth Doctor's by chance when a spatial rift in the Magellan Cluster allowed a Dalek ship from this universe to enter the Eighth Doctor's. There, the alternative Daleks came into conflict with the Dalek Hive. The Hive Daleks were terrified by the potential of their parallel counterparts, who took months to subdue even with all of the Dalek Hive's resources. This led the Supreme Dalek to mastermind a preemptive strike on the alternate universe, taking control of the engineered sun known as Crivello's Cauldron in order to turn it into a wormhole that would allow the Daleks to conquer the rest of the Multiverse. However, in the few seconds after the portal opened but before the Dalek Hive could cross it, more Spider Daleks came through on the attack (with a group managing to destroy the Supreme Dalek himself), alongside a swarm of Great Vampires from another universe. (COMIC: Fire and Brimstone)