Within the Warp, thoughts and emotions flow together, fed by fellow feelings until they achieve a consciousness of sorts. They become entities of greater or lesser potency depending on the intensity of their origin. Amidst the swirling psychic energy of the Empyrean, the corruption of the decadent Aeldari became manifest on a horrifying scale as the flood of raw emotions coalesced into a gestalt consciousness. Slowly, the Great Enemy stirred towards wakefulness. Too late, the Eldar realised that they had created a god in their own hideous image, a god grown immense and potent by suckling upon the dark fodder of the Eldar spirit. No creature was ever conceived that was as terrible or perverse as the Chaos God Slaanesh. It is a name the Eldar will not speak, instead whispering Sai'lanthresh,