Stygia-Aquilon

Stygia-Aquilon is the Executioners' twin: a fire world and an ice world locked around a dying sun, with the asteroid fortress Darkenvault trapped between them. After Badab they served a century of penitent crusade; sources disagree whether Sons of Medusa or Salamanders plus successors held the twins, and later accounts send the Chapter home. This is not wave-3 Stygia the Knight dead world, not Stygies VIII, and not Stygia XII.