Time Lords

"Shouldn't your database entry be 'Time Lord'? Singular? I mean, I am the only one you know of."

- The Dark Hand, to Julius Keeler

Overview
Little is known about the Time Lords besides vague, often contradictory, references by the Dark Hand to other members of its species. They could rule an empire in control of many worlds contained in a single plane of immense scope, or are nearly extinct. What is known is that only one Time Lord has ever been confirmed to have been present on Nexus ever, though there is some confusion as to when this being appeared, and questions as to whether or not all such recorded appearances are, in fact, the same entity.

History
The Time Lords are believed to be one of the oldest and most powerful races of their Plane of Origin, which has never been named. Arising early in the Planes existence, and dominating many worlds contained within through technological means. They developed the ability to travel in time, and as such, master both Time, and Space, for untold eons.

The danger they pose to any given Plane, perhaps even the Multiverse as a whole, cannot be understated. One single Time Lord, operating alone and without any known support, is believed to be capable of immense destructive potential, posing a threat to entire Planes. Often even unintentionally.

Despite their domination and power, however, they are believed to have been wiped out by another, unnamed, race of nearly equal power. Only a handful are believed to still exist, and it seems only one ever became aware of the existence of the Multiverse. The Dark Hand, the only confirmed Time Lord, and as such the only 'expert' on their species, is considered highly unreliable. Though their actions on worlds such as Nexus have led many to consider Time Lords a hostile species.

Personality
Time Lords have proven to be vain, vindictive, arrogant, and sporting a massive superiority complex, rivaling even dragons. Through their admittedly vast intelligence and technological advancement, they manipulate events across entire planes for years or decades to attain their goals, with little regard for the life or safety of others.

Traits
Time Lords are highly intelligent, and show great aptitude for critical thinking and problem solving. Their access to advanced technology, including machines enabling them to travel through time, make them dangerous foes. They're also believed to be immortal, living an unknown amount of time without aging, and resurrecting themselves from the dead through unknown means.