Assault Spiders are biomechanical weapons created and utilized by the mysterious Ravagers for use against the indigenous inhabitants of the planet Earth. Three types are currently known to exist: typical Assault Spiders, followed by Large Spiders and finally King Spiders, all of which are distinguished between one other simply by their overall size. As with Terror Ants, the spider was apparently chosen in an attempt to instill fear in the local sapient inhabitants.