For everyone that likes Warhammer 40k Tabletop and Dawn of War Games or anything to do with Warhammer 40K.
Part of the cursed 21st founding, the Sons of Antaeus have a mysterious existence. It is unknown what exactly went wrong, if anything, in the creation of these mysterious astartes. What is known is that they are extremely durable and resistant to pain.
Some sort of unknown mutation within the chapter gene-seed has provided them with unforeseen benefits in combat. Marines within the chapter are capable of withstanding damage that would typically kill any normal Space Marine, with their endurance being compared to that of the foul plague marines of the Death guard traitor legion.
Looks like the Imperial Fists have competition for most masochistic Loyalists.
Well they are not Masochistic instead they are very shy...
Cursed founding, extra resilience eh? Sounds like someone put those 14th Legion gene stocks into "good" use.