The Sixth Black Crusade, or Drecarth's Folly, was one of the Black Crusades of Abaddon the Despoiler, taking place in 901.M36.[Needs Citation]
"And men will bare their breasts
And invite destruction to take them".
During the Crusade, Abaddon conspired to eliminate rival fellow former Sons of Horus warband leader Drecarth the Sightless. Forging an alliance with Drecarth and his Sons of the Eye, the Chaos forces assaulted the Forge World of Arkreath. During the battle, the Adeptus Mechanicus defenders are crushed and their ziggurats are reduced to a point where they can no longer function as sophisticated flux-cages. However at the end of the battle while they were celebrating their victory, Abaddon betrayed Drecarth and impaled him on his Power Claw. After the death of their leader, the Sons of the Eye joined the Black Legion.