Dimensioneer

The Dimensioneers were a faction of Time Lords that sought to cross the dimensional divide and bestrode the infinity of dimensions through the interdimensional vortices they created. They also created the dimensional nodes, which the Master considered made the Key to Time look like a trinket. The node activator required a Time Lord to be slaved to them, which could access interdimensional energy. They were eventually banished by the Time Lords, and their technology locked away as they fell into legend. (AUDIO: UNIT: Dominion)