The Elder Scrolls IV: Oblivion Guide - Daedric Shrine Quests
Location: Far southeast of Chorrol.
Requires: Lion Pelt
Level Requirement: Level 17
Reward: Mace of Molag Bal
Molag Bal's Shrine is located southeast of Chorrol. If you look at the world map, the shrine is located just a short way southwest of the first 'T' in 'The Great Forest' text. As you traverse the surrounding area, a Daedric Shrine symbol should appear on your compass. When the symbol appears, follow it to reach the shrine.
Offer a Lion Pelt at Molag Bal's altar to summon the Daedric Lord.
Once you've located Molag Bal's Shrine, speak to the Redguard named Amir. Amir explains that in order to summon the Daedric Prince, one must leave an offering of a Lion Pelt. Lion Pelts are fairly easy to come by, as you have likely already been attacked by a Mountain Lion while exploring the wilderness, provided your character is at least level 17.
Once you have obtained the pelt, approach Molag Bal's Shrine and offer it to summon the Daedric Prince. Molag Bal wants you to help him corrupt a man named Melus Petilius by forcing him to kill you with the Cursed Mace. Melus Petilius lives near Brindle Home, which has been marked on your map. Travel there, enter Torbal the Sufficient's house, and ask the man inside about Melus and his wife Vena. If Torbal isn't there, wait until night time and try again. His disposition must be at least 60 before he will divulge Melus' location. When willing, Torbal will point you to Melus' cabin, which is not far from your current location.
The grave of Melus' wife is located southeast of his cabin. Approach the grave and wait for him there, provided he isn't there already. Melus leaves his cabin at 11:00AM each day to visit his wife's grave. When you encounter Melus at his wife's grave, drop the Cursed Mace on the ground, and then strike to anger him. Once he's angry, he should pick up the Cursed Mace that you dropped and begin to attack you. All that is left to do at this point is to stand by while he beats your character senseless. You needn't remove your character's armour to speed up the process, as this makes a good time to build up your Heavy or Light Armor skill.
Drop the Cursed Mace at the foot of Vena Petilius' grave and attack Melus while he is there to set him off.
When Melus Petilius has killed your character with the Cursed Mace, you will be transported back to Molag Bal's Shrine. Approach the shrine and summon the Daedric Prince once more. Molag Bal will reward you with the Mace of Molag Bal. This weapon has Absorb Strength and Absorb Magicka Effects, neither of which are particularly useful.
Corrupting Melus Petilius.