Soul Edge
Cassandra continued her quest to find Soul Edge in "Soulcalibur III". She briefly returned to Greece to request Rothion to forge her new weapons after the Omega sword was broken following a skirmish at a corrupted city. He told her that Sophitia had gone to destroy Soul Edge on her own. She visited the city that she went earlier, where she met a man named Raphael who stole her fragment of Soul Edge. Before departing, he told that while she had the power to dispel evil, she was not as strong as the "Holy Stone". After hearing rumors in the city about a man with a large mass of crystal on his way to Ostrheinsburg Castle, Cassandra reasoned he carried the Holy Stone to fight some evil there, which she theorized was Soul Edge. Therefore, Cassandra went to the castle.