The Kur Stone is a powerful mystic rock that can lead you to the legendary cryptid Kur. It is written in an ancient language Sumarian. Argost tries to get it from the Secret Scientists in the first episode. Soon he obtains it and searches for the evil Kur. If he ever finds Kur, he will be able to control cryptids like Zak! Zak possibly gets his power from the Kur Stone.