21st Founding - Select Chapters of the 21st Founding: Black Dragons - The Black Dragons' Ossmodula causes excessive bony protuberances and growths to appear on the forearms and head. The Black Dragons were censured by the Inquisition due to the mutation of the Chapter's gene-seed, especially the Ossmodula, which causes certain Astartes of the Chapter to develop blade-like outgrowths of bone on the head and forearms and to grow long, poisonous fangs. The Black Dragons' obvious physical mutations make long-term cooperation with other (less tolerant) Imperial Adepta impossible. The Black Dragons are a Chapter who push the Inquisition to the limits of its tolerance.Blood Gorgons - Multiple Chaos mutations, aversion to authority and highly independent. The Imperium declared the Blood Gorgons Renegade and Excommunicate Traitoris a mere six solar decades after their founding. The Blood Gorgons, who value their freedom and independence above all else, refuse to swear allegiance to any patron Chaos God, preferring to serve Chaos in general in the form of Chaos Undivided.Fire Hawks - The Fire Hawks Chapter has often been held in higher regard among the High Lords of Terra and their agents than by many of their other wartime allies, particularly amongst other Astartes. This was because several other Space Marine Chapters considered the Fire Hawks darkly tainted, overly prideful and wanting in brotherhood. Some went so far as to suggest that the Fire Hawks had been corrupted by some flaw in the Chapter's collective psyche or gene-seed, though none would gainsay their effectiveness in battle. Eventually the Fire Hawks became lost in the Warp and contracted an unknown Warp contagion. As many as two hundred members of the Chapter may have survived and renamed themselves the Legion of the Damned.Flame Falcons - Declared Excommunicate Traitoris within a century of their inception. Almost entirely wiped out by the Inquisition's Grey Knights after they assaulted the Flame Falcons' homeworld of Lethe, following a great victory when their bodies spontaneously burst into flames that did not burn their own flesh. Though a small number of Flame Falcons escaped that day, nothing of their fate is known.Lamenters - The Lamenters seem to have been cursed by a dark shadow of ill-fortune that has long determined their fate. The Lamenters' gene-seed may have been tampered with during their creation process by the Adeptus Mechanicus in an effort to rid them of the genetic flaws found within the Blood Angels' gene-seed. The Lamenters sided with the Secessionist forces during the Badab War, were defeated, and subsequently required to undertake a 100-year-long Penitent Crusade. They were almost annihilated and absorbed by Hive Fleet Kraken. The Lamenters seemed to suffer from a constant string of ill fortune.Minotaurs - Entirely consumed by a xenophobic hatred that far surpasses the righteous fury of a normal Space Marine. The Minotaurs are also prone to berserk fury and ferocious assaults. Strongly Assault Squad-oriented Chapter. It is not known whether the Minotaurs' barely-controlled battle fury and desire to shun those they should call comrades is a result of some particular curse in their blood, but whether or not their affliction has mastered them or they have finally mastered it remains unknown. The Minotaurs have been known to show pleasure in testing their skills against worthy foes. Some speculate that perhaps the Minotaurs consider their fellow Astartes as particularly worthy, since they have a predilection for following the commands of the High Lords of Terra to castigate or annihilate a Renegade Chapter without fail or protest.Sons of Antaeus - During the inception of the Sons of Antaeus Chapter, its creators extensively modified the gene-seed in order to create Space Marines of exceptional durability, hardiness, size and strength. Whether their skeletal structure was enhanced with an artificial substance, or other more esoteric procedures were used to enhance their gene-seed is unknown. Less sympathetic observers point out that the Chapter appears every bit as resilient as the Death Guard Traitor Legion.