J-cat's challenge

You were the first to pop into mind, Lux. I knew you wouldn't take it personally.

I've been playing Call of Cthulhu: Dark corners of the Earth lately, which is what inspired this.

"Ia! Ia! Cthulhu fhtagn," Lux chanted as Halloween's full moon reached its apex.

His neck split open on either side in the formation of gills. His skin grew cold and slimy, and his fingers and toes elongated into tentacles. He was a god among simple men, and his will would finally be done. The oceans were now his to protect, and his to command. At long last, the Ancient Ones would return.