The Elder Scrolls IV: Oblivion Guide - Daedric Shrine Quests
Location: East of Bruma.
Requires: Personality attribute below 20.
Level Requirement: Level 5
Reward: Ring of Namira
To reach Namira's Shrine, fast travel to the Wildeye Stables outside of Bruma and head east from there. You will eventually reach the Plundered Mine, at which point the Daedric Shrine symbol should appear on your compass. Follow the symbol to reach Naira's Shrine.
Activate the Shrine of Namira while your character's Personality attribute is below 20 to summon the Daedric Lord.
If your character's Personality attribute is higher than 20, you won't be able to summon Namira. To lower your character's Personality attribute, have him or her down a few bottles of Cheap Wine. You can purchase some Cheap Wine from Olav's Tap and Tack in Bruma. Drink enough Cheap Wine to drop your character's Personality attribute to below 20, then approach the shrine to summon Namira. Your character must be at least level 5 to begin this quest.
Namira tells you of Anga, which is a ruin that several of her followers inhabit. Some priests are planning to visit this ruin to save the Forgotten inside. Namira wants you to travel to Anga to help her worshipers kill the priests of Arkay by casting the Namira's Shroud spell. Anga is located south of Namira's Shrine.
With 'Namira' set as your active quest, follow the marker on your compass to reach Anga. Once inside, all you must do is follow the markers on your compass and cast Namira's Shroud on the priests that you come to. When the spell has been cast, the Forgotten will surround the priest and kill him. Do this to each marked priest in Anga to finish the task. Don't kill any of the priests yourself, as by doing so, you'll forfeit the reward.
Cast the Namira's Shroud spell on a Priest of Arkay to cause the Forgotten Ones to attack.
Once all of the priests of Arkay are dead, return to Namira's Shrine and summon her once more. Namira will reward you with the Ring of Namira, which is enchanted with Reflect Damage and Reflect Spell effects.