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Cadian Pylon[2]
Targetdrone.gif This article is about the structures on Cadia; for the Necron mobile weapons emplacement, see Necron Pylon.

The Pylons are monumental constructions of unknown origins on a number of planets across the galaxy that hold back the tides of the Warp.


These structures are one kilometre tall, half a kilometre under the earth and half a kilometre on each side. They have an intricate system on tunnels bored into them, which are impossible to map, as even the smallest servitor never returns from a journey within them. There tends to be a complex arrangement of them across a particular planet, such as those on Cadia.

Made of Blackstone[3], they are believed to be of Necron design[Needs Citation] and intended to influence the warp in their immediate area, this is thought to be the reason that there is a relative calm area of warp space, now called the Cadian Gate, which is the only safe thoroughfare in the area. Inquisitor Quixos attempted to construct his own in order to further his own Radical goals.

Pylons can be reduced to ruin through overloading them with massive amounts of Warp energy, such as an influx of Daemons. During his Black Crusades, Abaddon hunted and destroyed pylon networks on planets near the Eye of Terror, thereby weakening the barrier between the Warp and realspace. During the 13th Black Crusade, he destroyed Cadia itself, and its pylon network with it. This caused the formation of the Great Rift, which split the galaxy in two.


The pylons were first introduced in the novel Malleus by Dan Abnett. Eisenhorn hunted a radical Inquisitor named Quixos, who believed the pylons on Cadia held back the Eye of Terror and could be made to close it altogether if amplified.[Needs Citation]

See also