Lava Spider

 was a race from an other Dimension. They turned part of Schwarzwald into their web. When Dr Elizabeth Klein, Sgt. Pete Wilson and Private Maynard went to investigate they we attacked and placed in the web to be food for them. They could input Lava into the web to kill their pray quicker then constriction. The Seventh Doctor and Raine Creevey helped them when they arrived from their dimension. (AUDIO: UNIT: Dominion)