The Missing Brother is a side quest in Egypt (Act II). It is given by a woman named Tathari, who's standing near the Portal in Memphis. She tells you of her brother Unas, who wandered off to their family tomb to wake an ancestral guardian creature. Tathari requests you to look after her brother and bring him back. After you have killed the creature, you may talk to Unas, but he will just say thank you. Return to Tathari in Memphis to get a reward and to complete the quest. Reward: 10000 Experience and a random magical ring.