The Legio Ignis (Fire Kings) is a Loyalist Titan Legion of the Collegia Titanica, one of the military arms of the Adeptus Mechanicus. There is very little information in Imperial records about this obscure Titan Legion, though it is suspected to have been founded before the Age of the Imperium, during the Age of Strife. Elements of this Titan Legion fought alongside the Salamanders Space Marine Legion during the Great Crusade in the late 30th Millennium.