Formula for doors

The formula for doors was a complex ritual which manipulated the data sets of the universal fabric to generate a gateway out of nothing. 
The Minister of Chance, a renegade Time Lord, had his TARDIS revoked as punishment for misusing his powers by the Seventh Doctor. (WC: ) As a result, he began to rely on the formula for doors to travel the universe, a much more cumbersome process which did not allow short range travel, only journeys between planets or to alternative planes of existence such as the Frost Bridge or the river Hex. The technique was also known to the Horseman, although during his many years of exile on the Broken World he lost his finesse, only being able to create crude, unstable metallic-looking doors. (PROSE: , AUDIO: , etc.)
Category:Gallifreyan technology