He figures out how to use various Atlantean devices and even produce orichalcum beads. With this knowledge he saves Sophia from a prison, and they make their way to the center of Atlantis, where her medallion guides them to the home of Nur-Ab-Sal. The spirit of the Atlantean king takes full possession of Sophia[22] and it is only by a trick that Indy rids her of the necklace and destroys it, thus freeing her.