What happens when All Myths Are True is turned Up to Eleven? You get a Fantasy Kitchen Sink! Everything is true, even if it comes from vastly different origins. So not only are there really dragons, there are fairies, ghosts, vampires, werewolves, mummies, zombies, aliens, robots, time travelers, espers, angels, demons, gods, eldritch abominations, precursors, magic, and so on. Generally a sure sign of it is when creatures from typically different genres (Sci-Fi, Horror, and Fantasy) all exist within the same world with individual origins of their own, each implausible in their own way — leading up to a long series of suspensions of disbelief rather than just one.
