Horus
- “Better to reign in Hell than to serve in Heaven.”
- -Lucifer in John Milton's Paradise Lost
- "Let the galaxy burn."
- -Horus Lupercal
- "'I have sinned,' he said, 'for I have betrayed innocent blood.'"
- -Judas Iscariot, Matthew 27:4
Horus Lupercal, The Breaker of Tyrants, The Warmaster, The Arch-Traitor, (more often known as just Horus or Fucking Horus!) was the Primarch of the Luna Wolves/Sons of Horus/Black Legion, and the main figure in the event known as the Horus Heresy (this is NOT a dead giveaway. Oh no). Once the most favoured son of his father the God-Emperor of Mankind, he began to resent his father's treatment of him and other Primarchs, and believing that the Emperor's secret plan was to become a god using his own Primarch sons as a tool (when in fact all this is due to the lies of a certain religious zealot), eventually turned to Chaos. If you really need to be told any of this, what the fuck are you doing on /tg/ in the first place? This is such common knowledge, that the outlines of the Horus Heresy and every bad ass taking part in it, are more or less engraved in the mind of every /tg/ reader. Much like the Emperor being crippled and the Imperium devolving into a bureaucratic grimdark empire, the death of Horus and the placement of Abaddon as the most influential Chaos champion ever, turned the Chaos legions from a genocidal force bent on utter domination for the glory of Chaos into a Saturday-morning cartoon villain organization. Also his armour made him look like an egg.
It is argued that Horus was not actually evil but possessed by the Chaos Gods or that he was a victim of Lorgar, who is officially labeled as "The First Heretic." However, he was still a massive dick. Hence the common saying in the post-Heresy Imperium: "Of all the mighty Primarchs, Horus sure was a dick."
But long story short, the Imperium got into this fucked up state because this guy had daddy issues (honestly, who didn't?), he got scammed by religious nutjobs, and because the Chaos Gods showed him horrific visions of the future, supposedly under the Emperor's rule. Lol-irony.