They are supposed to have at least a death god called Cetanu. So if that is true, then they must have other gods too. Anyway, i don`t understand what you mean by "worship blood or great hunt" nut i can tell you something for sure: no civilisation that doesn`t know how to replicate the creation of the Universe will belive that there isn`t at least one god. Because uncertainty leads to beleif. And so if they don`t know how to make a Universe and throw it at us, they will surely belive that at some point there was a greater being who created something in otherwise impossible conditions for that thing to form. Or so.