A scientist accidentally gains the power to turn himself into living stone, and to turn others into stone statues. He comes to New York to attack Thor, hoping to gain the secret of immortality. As Don Blake, Thor tricks him into falling into the river, and his stone body sinks to the bottom.; Loki forces the Norn Queen to tell him of Balder's weakness to mistletoe and tries to kill him with a mistletoe dart, but the Norn Queen herself stops him.