Prior to Garion's visit to Rak Urga, the sword of the last king of the Cthan Dynasty, King Ad Rak Cthoros, was a sword with its hilt encrusted with rubies. Upon Urgit's crossing this sword with Garion's Sword, the Orb changed the rubies to bright blue sapphires.
"I'm a Murgo, too," [Prala] declared defiantly, "I'm descended from the Cthan Dynasty. I'm not afraid of battles!" She caught the reins of her horse and lifted the long black leather case down from her saddle. She untied the fastenings and snapped the case open. Inside lay a sword, its hilt encrusted with rubies. She lifted it from the case and held it aloft. "This is the sword of the last king of the Cthan Dynasty," she announced dramatically. "He took the field with it at Vo Mimbre. Do not dishonor it." She reversed the blade and offered him the hilt across her forearm.
He stared first at her and then at the sword.
"It was to have been my gift to you on our wedding day," she said to him, "but you need it now. Take the sword, King of the Murgos, and get on your horse. We have a battle to win."
He took the sword and held it up. The rubies caught the sun like drops of blood on the hilt. Then he suddenly turned, as if on an impulse. "Cross swords, with me, Belgarion," he said, "for luck."
Garion nodded and drew his great sword. The fire that ran up its blade was a bright blue; when he touched Urgit's extended weapon with it, the smaller man winced as if the hilt of his sword had suddenly burned his hand. Then he stared at it incredulously. The stones on the hilt of his sword were no longer rubies, but bright blue sapphires. "Did you do that?" he gasped.
"No," Garion replied. "The Orb did. It seems to like you for some reason. Good luck, your Majesty." - King of the Murgos