The Orbital Spire is a major structure on Graia. It is an immense ground-to-space transport structure situated relatively close to Manufactorium Ajakis and the Kalkys Facility, able to receive and deliver shipments from the planetary surface directly to ships in orbit.

The invasion orchestrated by Chaos Sorcerer Nemeroth involved using the Orbital Spire as a conduit to transmit raw Warp energy into space above Graia, opening a Warp Rift large enough to allow the arrival of a Chaos war fleet. However, the plan is thwarted by the actions of Captain Titus and the Princeps of the Warlord-class Titan Invictus .


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