- You may be looking for Quantum Shade.
The Elemental Shades were a type of living shadows. In the 1970s, an Elemental Shade escaped the Howling Halls and was tracked by the Tenth Doctor to the home of Elton Pope and his mother. It managed to kill Elton's mother before the Doctor could stop it. (TV: Love & Monsters)
Beyond the nickname, there is no known correlation between Elemental Shades and Vashta Nerada.