Horus as bright as the sun was explained by a tale, known as "The Contendings of Horus and Seth". In this tale, it was said that Set, the patron of Upper Egypt, and Horus, the patron of Lower Egypt, had battled for Egypt brutally, with neither side victorious, until eventually the gods sided with Horus. As Horus was the ultimate victor he became known as "ḥr.w wr" "Horus the Great", but more usually translated "Horus the Elder". In the struggle, Set had lost a testicle, and Horus's eye was gouged out. Horus represented the eclipsing binary Algol in the Calendar of
The Horus Heresy (novels) The powers of Chaos desire change and conflict by nature, and seek to destabilise and subvert the Imperium's order over the galaxy from within. 1. Horus Rising: the seeds of heresy are sown "Horus Rising", the series opener, starts in the early years of the 31st millennium, during the 203rd year of the Great Crusade. It describes the rise to power of Horus Lupercal, Primarch of the "Luna Wolves" Legion of Space Marines, and the most versatile and favoured "son" of the Emperor. The Emperor has recently appointed him Warmaster, overall commander of Imperial military forces, and has renamed his