Some believe that In the 41st Millennium, the [[Castaferrum Pattern Dreadnought]], had become the most common.{{Fn|1a}} The design may share of the Contemptor shares systems with the dreaded, near-mythical battle-automata of the [[Legio Cybernetica]]. If this is the case, it which may explain why so few Contemptors remain in service as of [[M41]].{{Fn|1a}} Those few that still remain in service are relics of the [[Great Crusade]], [[Horus Heresy]], and [[The Scouring]].{{Fn|4a}} In the 41st Millennium, the [[Castaferrum Pattern Dreadnought]] has become the most common.{{Fn|1a}}

Given the rarity of the Contemptor-pattern chassis, they those few that still remain in service are revered as Relics amongst the [[Space Marine Chapter]]s, blessed enough to count these ancient war machines amongst their arsenal. It is not uncommon for those Chapters to embellish their armoured sarcophagus with scripture, honour scrolls and additional details to commemorate the heroism and indomitable valour of the Ancient enshrined within.{{Fn|5}}

The '''Contemptor-Cortus''' was a lesser variant of the ‘Prime’ Contemptor pattern. Utilizing many of its base components, the most sophisticated systems were replaced with less potent ones which could be more readily fabricated in the field by the [[Legiones Astartes]]. The result was a war machine with unique strengths and combat characteristics, but also a reputation for instability, due to the barbaric indifference to the sanity or biological stability of the one entombed within. {{Fn|6}} First created during the [[Ullanor Crusade]], the [[Mechanicum]] strongly disapproved of this makeshift design, and it was abandoned for a time. However, as the [[Horus Heresy]] broke out, this more-easily produced variant was returned to widespread service.{{Fn|6}}

Instead of standard twin-linked heavy bolters, this class is armed with two weapons of the same type - [[Multi-Melta]]s, twin-linked [[Autocannon]]s, [[Kheres pattern Assault Cannon]]s, or twin-linked [[Lascannon]]s.{{Fn|1b}}TheMortis The Mortis is often ttted fitted with a helical targeting array slaved to enhanced target-cursing logis engines that allow it to track its foe with unprecedented accuracy and which make it particularly deadly against enemy uyers. {{Fn|3b}} Initially, the majority of Mortis sub-pattern Dreadnoughts were of the Contemptor type, but as the [[Castraferrum ]] patterns (Mk IV and Mk V) Dreadnoughts have entered service in increasing numbers, this sub-pattern has been pressed into the anti-air role across all of the war zones of the Imperium.{{Fn|3b}}

The '''Contemptor-Incaendius Class Dreadnought''' was a variant of Contemptor used by the [[Blood Angels]] [[Space Marine Legion|Legion]], used in devastating shock assaults. Classified as a "fast attack" Dreadnought, the {{Fn|8}} The chassis was equipped with a [[Jump Pack|Incaendius Booster Pack]] which allowed , a massive rocket booster pack installed on the rear torso of the Contemptor-Incaendius, with enough fuel for a single prolonged burn{{Fn|10b}}. This is used either to drop the Dreadnought to fall from low orbit , or make small jumps despite to allow it to cover the distance to the foe in a series of long leaps. Once its bulkfuel is exhausted, the booster pack is purged from the Dreadnought’s chassis by a system of explosive bolts. {{Fn|8}} This class of Dreadnought was only built within [[Mechanicum]] enclaves located on [[Baal]]'s first moon as per an agreement between the Blood Angels homeworld and the [[Forge World]] of [[Anvillus]]. Armed with twin [[Perdition Weapon|Talons of Perdition]] with built-in [[Heavy Flamer]]s, the Incaendius served as a shock assault unit of unparalleled ferocity.{{Fn|8}}

[[Image:OsironPattern.jpg|thumb|220px|Osiron Class Dreadnought{{Fn|1039}}]]The '''Osiron Class Dreadnought''' was a type of Contemptor used by the [[Thousand Sons]]. These dreadnoughts were created by [[Magnus]] himself, and consisted of a mortally wounded [[psyker]] Space Marine laced with a psychometric barrier for protecting his brain. This allowed the Dreadnought to perform psychic abilities that was far safer to the user and its allies. {{Fn|7c}} As such, these Dreadnoughts were equipped with [[Force Weapon|Gravis Force Blade]]sand [[Æther-Fire Weapon]]s{{Fn|11b}}. Records indicate that not long before the Council of Nikaea, Magnus gave the schematics to create such Dreadnoughts freely to the other Legions, though it is likely most spurned this gift entirely.{{Fn|7c}} 

*[[Aesir]] of the [[Space Wolves]]{{Fn|1140}}

*'''10''': [[Liber Astartes]]**{{Endn|1010a}}: https://www.forgeworld.co.uk/en-IE/Thousand-Sons-Legion-Osiron-Pattern-Contemptor-Dreadnought-with-Autocannon-2017**{{Endn|1110b}}: [[Horus Heresy (game system)]]: pg. 263*'''Core Set11''' — : [http[Liber Hereticus]]**{{Endn|11a}}://wh40kpg.lexicanum36**{{Endn|11b}}: pg.de/mediawiki/images/8/84/Aesir_%28Karte%29.jpg Aesir], card description265