It is revealed that he is Zenith's son who ascends with the other Horus members and therefore exists outside of our human frame of reference as far as time is concerned.
Notes: Appears to have first been used by Robert Anton Wilson in the Illuminatus Trilogy. From page 300-301: "the chief of these beings [the lloigor], is known in the Pnakotic Manuscripts and the Eltdown Shards as Iok-Sotot, 'Eater of Souls'" It is a variation of Yog-Sothoth. On page 331 the book says "And you've never received threats from any of these occult groups for mentioning Iok Sotot or Cthulhu outright in your stories?" and then later states "One doesn't have to believe in Yog Sothoth, the Eater of Souls". This is confirmed on page 127 which says "they worshipped Iok-Sotot, who became the Yog-Sothoth of the Necronomicon."