[BrainDeleted]

Don't blame them too much for Istvaan...Ferrus saw that there was no way out and, instead of dieing like a dog, choose to lead a brutal assault right into Horus's HQ...Basically Ferrus went for a suicidal stab at the heretic's throat. He figured that he was so beast that if he and his best broke through to Horus he'd slay him and at least he'd die having accomplished something. But instead he and nearly all the terminators and veterans of his legion slaughtered their way through to...something. No one really knows what happened to Ferrus...his body wasn't found. Some stories say he died in the melee and his head was presented to Fulgrim but thats never been proven...some say the Iron Hands got his body and escaped...Vulkan just didn't support his all or nothing assault.