I have dozen of pages of monsters that I have created over the years but Elementals have always been one of my favorites. They are a primordial expression of nature, yet it's so raw it often feels unnatural as well. In a DnD style setting Elementals are not even native to the material plane, the plane where most adventures begin and where they also take place. The Omnimental is not one of those. They are unnatural beings to both elementals and most adventurers. Omnimentals do not hail from the elemental planes but are from the void, the far reaches, gray reaches or where ever the chaotic wastes lie in a setting.