The Era, that was long long time ago, is the cruel Stone Age in people's impression. Actually, it is not true, there are many invisible eidolons in the world. They live among props, arms and guards, which makes people easier to use all kinds of tools, endues people with infinite courage, cures people's illness and give people power. In addition, there are many unprecedented metamorphosed animals and dinosaurs which people show more interested in, they appear one by one. Not only can you meet them in battle, you can also feed them as pets in peacetime. If you could collect all the dinosaurs, you can make a dinosaur encyclopedia illustrations by camera function!