The set up is already there the deep ones ( the Sahagins) The underwater sea city Amaurot (R'lyeh) is the perfect setup DO NOT OVERLOOK THIS OPPORTUNITY SE!!!!!!!!!!!!:cool::cool::cool::cool::cool::cool::cool::cool::cool::cool:
Also haven the sahagins chant "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn."
Would be awesome.