"<sigh>...Aim for the crests..."
Gorodion, the Guillotine, The Isstvan III Atrocity
Sintaur Gorodion, Veteran Sergeant of the Chyamaras Seeker Squad, was [half]jokingly described by his brethren as being "so neurotic he kept his psychosis in check". Among the Luna Wolves, few loved the battlefield so much, and even fewer delighted in the bloodshed with the same pure release the otherwise introvert Cthonian did.
More precisely, Sintaur was an adept of bleeding enemy morale. Upon first taking command of a Devastator squad, he immediately proceeded to apply Horus' strategy of decapitation, quelling the usual lust for sheer body count Devastators evidenced.
Although this option saw him clash multiple times with his superiors, in time the results proved Gorodion undeniably right. Enemy squads and even companies would see their leaders and command squads disappear in a daze of plasma blasts, heavy-bolter rounds and laser-streaks almost as soon as the battle began, with devastating effects on their morale and coordination.
It's no wonder, than, that the adoption of Seeker Squads among the Sons of Horus saw Gorodion as one of its fervent supporters. Although more than half of his squad was still comprosed of heavy-weapon-wielding Devastators, he included some of the best marksmen the Legion had. At Isstvan III, squad Chyamaras would claim more than 80 enemy leaders, between Sergeants, Champions and Captains.
On the eve of that fateful day, Gorodion was the host to a disturbing change...from inside his helm, a single eye in the very image of the Legion's symbol peered with a blazing, ghastly gaze that left unsettled even the most sadistic of his brethren. Many were quick to attribute the feeling to the vision of the legion's eye coupled with the dark nature of the Seeker Sergeant. Others claimed that they were uncomfortable with voluntary cybernetics, since Gorodion had suffered no injured that justified the implantation of a bionic eye.
But those Sons of Horus more privy to the dark side of Horus' rebellion had a deeper, more sinister suspicion regarding Sintaur's change. Some of these warriors, as well as many of the Legion's Apothecaries - who knew full well that no surgery had been performed on Sintaur Gorodion - would soon enough regret being right.