Dreadnought - Chapter-Specific Dreadnought Variants: There are several Castraferrum Dreadnought variants that are used exclusively by certain Chapters, and these Dreadnoughts are used only by these Chapters and any Successor Chapters they may have. The known Chapter-Specific Castraferrum Dreadnought variants are as follows:Furioso Dreadnought - The Furioso Dreadnought is a variant of the standard Castraferrum Dreadnought and is used almost exclusively by the Blood Angels and their Successor Chapters. The Furioso Dreadnought replaces the single long-range weapon carried by standard Dreadnoughts with a second Dreadnought Close Combat Weapon. True Furioso Dreadnoughts used by the Blood Angels and their Successor Chapters use special Dreadnought weapons known as Bloodfists and Blood Talons. These Dreadnoughts can also be armed with two specialised weapons used only by the Blood Angels and their Successor Chapters known as the Magna-Grapple and the Frag Cannon, these weapons make the Furioso Dreadnought more effective in medium-ranged combat. The Furioso Dreadnought has two further specialised variants that are found in use amongst the Blood Angels and their Successor Chapters, including the:Death Company Dreadnought - Blood Angels Dreadnoughts are not immune to the effects of the Black Rage that plagues the Sons of Sanguinius. When a Blood Angels Dreadnought falls to the Black Rage, it becomes nearly impossible for the Chapter to restrain him, and as such he may rage out of control for days until the Chapter's Techmarines can rig a device to disable him. The Chapter's Sanguinary Priests can then judge whether or not the Dreadnought's Astartes occupant should be sedated until the next battle or relieved of his life so that another may take his place. If the occupant of the Dreadnought is still sane enough to follow direction, he will be moved to the Chapter's Death Company, where his Dreadnought body will be able to withstand tremendous amounts of punishment and his unending rage will result in the deaths of many foes.Librarian Dreadnought - When a Blood Angels Librarian is critically wounded in combat, they can also be placed inside of the armoured sarcophagus of a Dreadnought. These Dreadnoughts, known as Librarian Dreadnoughts, are outfitted with built-in Psychic Hoods and are equipped with a Force Weapon, usually a Force Halberd, in place of one of the Furioso's Bloodfists. These Dreadnoughts are still capable of unleashing their powerful psyker abilities, and are protected by the Dreadnought's thick hull. Librarian Dreadnoughts are extremely rare amongst the Blood Angels and their Successor Chapters, and even rarer amongst the ranks of other Astartes Chapters.Doomglaive Dreadnought - The Doomglaive Dreadnought is one of the rarest and most advanced Dreadnought variants in Imperial service and is used exclusively by the Grey Knights Chapter, the secret Chapter of Space Marine psykers that serves as the Chamber Militant of the Inquisition's Ordo Malleus. The Doomglaive Dreadnought, like all Grey Knights Astartes, makes use of the Aegis, a complex network of protective prayers, runes and other wards which are inscribed into the chassis of an Doomglaive Dreadnought and psychically charged to provide better protection from the sorcerous powers of Daemons and the other servants of Chaos. While an Doomglaive Dreadnought is a fearsome opponent to face on the battlefield, the Doomglaive Dreadnought can provide more than just fire support to his Battle-Brothers, he is also able to support them with enhanced psychic defences. This is possible as a result of the psyber-circuitry that is incorporated into the Doomglaive Dreadnought's sarcophagus and which can link its own Aegis field to the psychic defences deployed by nearby Grey Knights Battle-Brothers, thus creating a series of reinforced psychic wards that is much stronger than what individual Grey Knights can project on their own.Deathwatch Dreadnought - The Deathwatch Dreadnought is a lethal war machine containing the remains of a venerated Space Marine who had been seconded to the Deathwatch, the Chamber Militant or the Ordo Xenos. The rarity of a member of a Kill-team being interred within the Adamantium sarcophagus of one of these towering war engines of destruction is almost unheard of, as such an honour means that this Astartes will remain forevermore in the service of the Long Watch rather than returning to his Chapter. Preserved within his armoured coffin the Space Marine hero is reborn as one of the Old Ones; a living holy relic who will fight on against the xenos nightmares that assail the realms of Mankind for centuries or even millennia to come. Deathwatch Dreadnoughts can be armed with all the same weapons as a standard Castraferrum Dreadnought.Space Wolves' Dreadnought - The Space Wolves' Dreadnought is a variant of the Castraferrum Dreadnought used only by the Space Wolves Chapter. Within each Space Wolves' Dreadnought's adamantium shell lie the remains of an honoured hero of the Chapter, broken in body but not in mind. Many of the Space Wolves' Dreadnoughts contain venerable heroes of legend, warriors who have taken to the field of battle in Leman Russ' name for thousands of standard years, their wisdom as deep as the ocean and their intuition as sharp as a Fenrisian kraken's teeth. Regardless of his history, each warrior entombed in a Dreadnought is determined to wage war against the enemies of their primarch until Morkai finally claims his due. The Dreadnoughts of the Space Wolves are sometimes armed with strange and fantastical weapons used only by the Space Wolves, such as Helfrost Cannons, Blizzard Shields and Fenrisian Great Axes.