Bull-TARDIS

Bull-TARDISes, or bull-engines, were a type of TARDIS.
War TARDISes were controlled through a Bull-TARDIS in the time vortex. (PROSE: The Taking of Planet 5)
Romana III wished to mate a Bull-TARDIS with Compassion to create the first Type 103 TARDISes; (PROSE: The Shadows of Avalon) later, 103-forms were bred through the mating of older 103-engines with bull-engines. (PROSE: The Book of the War)
Category:TARDIS variants
Category:Vehicles
Category:Vehicles in the War in Heaven
Category:Gallifreyan technology
Category:Time travel devices