An oval-shaped stone said to be the key leading to the legendary Sumerian cryptid Kur. According to the legend, whoever controls Kur would control the world. Doc and Drew Saturday lead the dig team that discovered the stone but they were not aware of what they had found. Doc was able to make a holographic model of one piece from impressions it left in the mud. Also, when Doyle joined the Saturdays, he stole a piece of the Stone from Argost, and when the Saturdays invaded Weird World again, Drew took a holographic picture of the final piece.