Warhammer: The Horus Heresy - Alpha Legion - Harrowmaster Armillus Dynat

Operating without equal in stealth, infiltration and covert operations, the XXth or Alpha Legion of the Space Marines is the one most shrouded in mystery. One of the first to reveal themselves as Traitor Brothers, this legion tricks and beguiles their foes until the very last moment, when it's too late to walk out of a cunning trap. Striking like the mystic hydra emblazoned as their sigil, they are both everywhere and nowhere at the same time; as one Brother falls, another will take his place to execute their long-plotted plans.

Placed in control of a theater of war by the Primarch himself, Armillus Dynat's name grew to infamy during the invasion of Paramar V, where he decimated and destroyed his enemies without mercy. Utilizing a fleet of fast vehicles and close air support to confuse, divide and encircle his opponents, Armillus was also a proficient duelist and reveled in close quarters combat, where he could see the life leave his opponent's eyes before the final strike.