Pylon

The Pylons are monumental constructions of unknown origins on a number of planets mear the eye of terror usually found near the Cadian Gate. They 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 imppossible 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. They are believed to be of Necron design, intended to influence the warp in their immediate area, this is thought to be the reason that there is a relative calm of the warp in the area now called the Cadian Gate, which is the only safe throughfare in the area. Inquisitor Quixos attempted to contruct his own in order to further his own Radical goals.