In the fictional universe of Warhammer 40,000, the C'tan originally lived as energy beings that fed on the stars themselves. They are also called star gods or star vampires. They were transferred to the physical world thanks to the technology of the Necrontyr. A fictional universe is a cohesive fictional world that serves as the setting or backdrop for one or (more commonly) multiple works of fiction. ... 3 Warhammer 40,000 Miniatures Warhammer 40,000 (informally known as Warhammer 40K or just 40K) is a tabletop miniature wargame, produced by the British gaming company Games Workshop. ... In the fictional universe of Warhammer 40,000, the Ctan convinced the Necrontyr to transform themselves into the Necrons. ...

The C'tan used the hatred of the Necrontyr towards the Old Ones to help them gather the more subtle living energy they now craved. The C'tan hate psykers (psychic telepathics who draw their power from the warp) and have thus set up a series of 'pylons' on Cadia, which, when completed, will close the Eye of Terror forever, thus blocking most psychic power. Warhammer 40,000 In the fictional universe of Warhammer 40,000, the Old Ones traveled through space and manipulated minor species on several planets to grow into tools for their battle against the Ctan. ... In the fictional universe of Warhammer 40,000, the Eye of Terror is a massive rift where the Warp enters realspace. ...

In the war between the C'tan and their now slaves the Necrons against the Old Ones and the younger races their red harvests started to run dry the Laughing God tricked the C'tan into consuming each other until only 4 remained. Then a plague of Enslavers emerged which apart from destroying the Old Ones also depleted the red harvests further. Thus the C'tan decided to enter stasis until their harvests could begin again. In the table-top wargame Warhammer 40,000, the Necrons are a mysterious race of skeletal warriors that have lain dormant in their stasis-tombs for millions of years. ... In the fictional universe of Warhammer 40,000, the Laughing God is an Eldar God. ...

The 4 remaining C'tan are:

• The Nightbringer (almost destroyed and starved but was released accidently by Space Marines)
• The Deceiver (came out of Stasis an unknown time ago and has been weaving plots ever since, including the destruction of the Eldar weapons Talismans of Vaul designed to destroy the C'tan on their emergence)
• The Void Dragon (the most powerful C'tan, resides in Stasis on Mars and is rumoured to be the Machine god)
• The Outsider (A C'tan that went insane due to its comsumption of other C'tan, is currently imprisoned in a Dyson sphere under the Galactic plane)