The Pantheon

The Pantheon of Discord was a group of Transcendental Beings that sought to alter reality and cause chaos. The Trickster was an embodiment of one or more members of the Pantheon. The Doctor had heard legends of the Pantheon when he was a child and claimed to have fought the shadows and the changelings of the Pantheon in the past. (SJA: The Wedding of Sarah Jane Smith).

It is unknown if members of the Trickster's Brigade are also members of the Pantheon. It is also unknown if the other Pantheon members, like the Trickster, were removed from the Universe and could only appear when someone is about to die. Although Clyde feigned a desire to "join" the Pantheon, it is not understood whether such a thing is possible; this is not the case for the Trickster's Brigade. (SJA: The Wedding of Sarah Jane Smith)