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The Saturnine Pattern is the tallest, heaviest, and most technologically advanced type of Tactical Dreadnought Armour. The Saturnine Pattern featured an additional exoskeleton frame to which slanted reinforced armour plates were attached.{{Fn|20}} Though slow and lumbering, they were nearly impenetrable to most forms of fire thanks to their heavy armour and [[Thermal Diffraction Field]]s.{{Fn|30}} The armour also possessed superior targeting systems that allowed its users to accurately aim and fire multiple weapons simultaneously. However like the [[Saturnine Dreadnought]], only a warrior possessing sufficient mental strength and discipline could utilize the armour pattern. It has also been suggested that the user required a measure of [[Cybertheurgy|cybertheurgic]] resonance, although few are willing to speak upon this.{{Fn|34}} The exact level of innate psychic ability to operate the armour is unclear, save that it is above that of an average Space Marine but still well below that of a [[Librarian]].{{Fn|36}}

However, this proved to be problematic as the [[Great Crusade]] wore on and its [[Expeditionary Fleet]]s outgrew the number of Tech-Wrights the Enclaves could send. Eventually, many fleets were forced to keep their damaged [[Saturnine Terminator Armour]] in storage, until they took on Tech-Wrights or returned to the [[Sol System]]. By the end of the Great Crusade, this limitation had led the Saturnines to be replaced by the more easily available and repairable [[Cataphractii]] and [[Tartaros]] Terminator Armours.{{Fn|42c}} Saturnine Armour was already fading into myth by the end of the Great Crusade until the [[Primarch]] [[Vulkan]] sought to recover the design. He was successful, and subsequently handed the revived pattern out to the rest of the Legiones Astartes and wider Mechanicum. Saturnine Armour thus saw use on both sides in the [[Horus Heresy]]{{Fn|29}}, though it first appeared on the battlefield in meaningful numbers in [[Salamanders]] use during the [[Drop Site Massacre]], in use with units such as the [[Pyre Warden]]s.{{Fn|35}}{{Fn|42e}} After witnessing its immense destructive power in Salamanders use on [[Isstvan V]], [[Perturabo]] quickly issued Saturnine Armour into his own ranks en masse. By the time of the [[Siege of Inwit]] there were entire heavy assault companies of the [[Iron Warriors]] equipped with this pattern such as the [[Tekathikos]].{{Fn|37b}} The [[Blood Angels]] soon followed suit, as seen with units such as the [[Colossi]].{{Fn|38}} Other Saturnine formations included the [[Helwrought]] of the [[Iron Hands]], [[Phraetus Anointed]] of the [[Word Bearers]],{{Fn|42f}} and [[Indurate]] of the [[World Eaters]].{{Fn|42g}} Later Vulkan-derived Saturnine Suits were distinguished from older Phoebian ones, which were dubbed '''Phoebian-issue Saturnine Armour'''.{{Fn|42d}}