The Age of Horus was basically Crowley's version of what is more commonly known as the "Age of Aquarius," and let us note here the watery chaos signified by that zodiacal sign with its suggestion of the destruction of Piscean order. The zodiacal transition between the ages of Pisces and Aquarius is a breaking up of order by the power of primordial chaos. Many of the characteristics of Cthulhu are obviously based on the mythological image of the Kraken, which was inspired by Norse encounters with giant squids -- the cephalopod cousins of the octopus. What Crowley envisioned for the "Age of Horus" is the releasing of the Kraken ... [from The Call of Cthulhu]
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What the rebel Atlanteans realized was that in order to defeat the gods, they needed to psychically summon a super-organism from depths that would truly be unfathomable. Any Thing that they could wrap their minds around or control, would be something that could also be comprehended, anticipated, contained, and controlled by their adversaries. So these titans summoned something Typhonian -- un-controllable and incomprehensible -- to rise up from the depths and break the walls of their prison. It did not just come through those vortices in the ocean of its own accord. The Thing was invited. The octopuses, who are from that same more complex biosphere of Earth's future, just came along for the ride. In the Sumerian language, from the time of the Anunaki, kutu lu means "Underworld Man." The rebel Atlanteans became underworld men and women when they called this shape-shifting "Cthulhu" from the future, from the place (topos) that they were denied by a false Utopia defined by the Perennial past.
Jorjani, Closer Encounters (2021)