The Blessing



The Blessing was an extremely long tunnel that went through the Earth from Buenos Aires to Shanghai. The Three Families used it to cause the miracle, by feeding it the blood of immortal Captain Jack Harkness. Being close to the Blessing caused many to feel uncomfortable, and seeing it was known to drive some people, such as Zheng Yibao, to suicide. According to an agent of the Three Families, these people were those who had something vile to hide.

The Three Families discovered the Blessing's presence by realizing that the average lifespan of people living in Shanghai over the Blessing was the exact same as the global average human lifespan, and had been so throughout history regardless of what the average was. The Blessing is the focus of a morphic field matrix that encompasses all humankind, and the Families were able to alter it by introducing Jack's blood on both sides of the fissure. As a mortal, Jack's blood was attracted to the Blessing. Introducing his mortal blood on both sides, via Jack himself and Rex Matheson, reversed the process. It was later sealed off by UNIT.

Despite being in charge of the Blessing, the Families were not entirely sure of its exact nature, such as whether or not it was a living organism. When pressed by Gwen, Jack theorized it might have something to do with Racnos Huon particles interacting with the Silurian hibernation field, but was forced to admit he had no idea. (TW: The Gathering, The Blood Line)

The Three Families were unable to repeat the process because Holly Mokri had already destroyed the Key, the facility housing extra stores of Jack's immortal blood. (TW: Web of Lies)