The Legio Tempestus is one of the oldest and most esteemed Titan Legions of the Collegia Titanica, one of the military arms of the Adeptus Mechanicus. One third of the fabled "Triad Ferrum Morgulus,": the Legio Tempestus (or Tempestor as some later accounts termed the Order) was founded alongside the Legio Mortis and Legio Ignatum in the distant Age of Strife on Mars. During the Great Crusade the Legio fought for decades at the leading edge of the Imperium's expansion alongside the most celebrated of the Legiones Astartes. Countless worlds were brought to Compliance and numerous xenos empires cast down for which the Legio became so well known, earning it the epithet "Stormlords." Later, however, the loyalties of the Legio Tempestus would be cast in doubt and the shadows of treachery attain