Clad in ancient suits of power armour, impressively powerful and daunting to behold, Mark III Space Marines are a living reminder of the dark days of the Horus Heresy. Their ‘Iron’ armour is a variation on the previous generation’s ‘Crusade’ pattern, with extra armour and reinforcements allowing them to absorb an unprecedented amount of enemy firepower. When encased in this armour, a Space Marine becomes an unstoppable juggernaut.