| in the Warhammer universe, an ancient race of giant amphibian superbeings.
They are largely responsible for the state of the World as it is today, having:
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created the warpgates at the two poles
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created all existing races on the planet through breeding
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placated the creatures of the Warp
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travelled the universe doing similar things to other planets
By some colossal error, they also brought about the destruction of the warpgates.
This caused:
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the entities known as Chaos Gods to enter the material universe,
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the creation of two continent-sized radioactive hellholes known as the Chaos Wastes
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the corruption of early Man, Dwarfs and Elves.
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the creation of the condensed warpstuff known as Warpstone
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the almost complete extinction of their race, with the exception of their degenerate descendants, the Slann
The Old Slann also play an important role in galactic history; in the WH40K worldview the Slann's catastrophe occurs simultaneously on all Slann worlds in the galaxy, and has been postulated to have created The Eye of Terror. | 
