The lost galaxy Nosfera II was the home of the Vampire Gods and their Vampire Weapon-Worlds.
History
Far out beyond the Great Astral Fogstorm of Orlock's Spiral, a billion miles from the nearest planet led the vast swirling fearsome Wormhole of Hellmouth, which was believed to lead to Nosfera II, Hellmouth was guarded by the Chiroptera. The Daleks travelled to the wormhole to see if the legends were true. The Dalek Fleet were ordered to fly through the Hellmouth, conquer Nosfera II and take control of the mythical Vampire Weapon-Worlds. As the fleet prepared to enter the wormhole, a hundred thousand Chiroptera came shrieking out. They tore the fleet to pieces, the Daleks were soon reduced to dust, though legend says their screams could still be heard echoing through the Astral Fog. (DWBIT: #37)
Behind the scenes
It is likely a play on the name 'Nosferatu', the name of a vampire in the 1922 film Nosferatu, eine Symphonie des Grauens (translated as Nosferatu: A Symphony of Horror).