Hellmouth

According to At the Mouth of Madness, the Hellmouth was a wormhole located beyond the Great Astral Fogstorm of Orlock's Spiral. It was believed to lead to Nosfera II, the home of the Vampire Gods. When the Daleks attempted to traverse the Hellmouth, they were reduced to ashes by the Chiroptera. (NOTVALID: Bats Out of Hell!)