The Taste of Death

Background
"We've discovered that some of the dead have been... eaten. Flesh has been chewed off, bones were snapped to get to the marrow inside."

- Brother Verulus

Hall of the Dead
The quest is given by Eola inside the Hall of the Dead in Markarth. She will appear inside the Hall of the Dead after Brother Verulus is convinced to talk about the reason why it is closed to visitors (through the dialogue options of persuasion, bribe or intimidation).

After being told that the Hall of the Dead is closed because many bodies have been eaten by an unknown intruder, the Dragonborn can accept a task from Brother Verulus to investigate the problem. He will give you the key to enter the crypt.

Once inside, an unknown woman's voice will be heard talking about cannibalism. Soon after Eola will reveal herself. She worships Namira, Lady of Decay, and seems to believe that the Dragonborn, like her, desires to feed from dead human bodies. The dialogue remains the same even if the player has not eaten Human Flesh to see its Alchemy effect.

Through dialogue, the player can listen to what she has to say or to confront and kill her. Listening to her will activate The Taste of Death quest. Eola will become invisible and leave the Hall of the Dead and go to Reachcliff Cave, where she will wait for the Dragonborn.

Regardless of whether the Dragonborn chooses to kill Eola or to listen to her, the Dragonborn can report back to Brother Verulus and tell him that the Hall of the Dead is safe, who will reward you with an Amulet of Arkay.

Reachcliff Cave
Eola will be waiting for the Dragonborn outside Reachcliff Cave, where she asks the player to defeat the Draugr inside. She will follow the Dragonborn in combat if asked.

After the dungeon is cleared, Eola will propose a feast to celebrate the victory. She will ask the Dragonborn to lure Brother Verulus into Reachcliff Cave to be eaten, as part of an initiation ritual. Back to the Hall of the Dead, Brother Verulus can be convinced to follow the Dragonborn through dialogue options (persuade, bribe or intimidate).

The Feast
When the Dragonborn arrives at Reachcliff Cave with Verulus, there will be a feast going on in the last chamber, with other cannibals around a big table. Eola talks to Verulus and convinces him to lay on the altar ("to rest", while he waits for the dinner).

Eola then asks the Dragonborn to kill Brother Verulus and feast on his flesh. After killing him, the Dragonborn can activate his body, and a dialogue box will appear with the options to eat or to leave Verulus' body alone. If the Dragonborn chooses to eat, the voice of Namira herself will sound, telling the Dragonborn she's pleased with them. She gives the Ring of Namira, which allows the Dragonborn to feed from dead human bodies.

At any moment before eating Verulus, it's possible to fight Eola and the members of the coven of Namira during the feast. This will cause the quest to fail. the quest will only fail if you fight the coven after you killed Verulus or if he doesn't survive the fight. If Verulus survives, he will give the Dragonborn a level-indexed cash reward and head back to Markarth. Objectives will still be marked as failed. (tested)

If the Dragonborn had bribed Verulus to follow, the bribe can be looted from Verulus' corpse after he is killed.
 * Detailed video walkthough available here

Bugs

 * If you kill Eola within Reachcliff Cave after you have accepted -Convince Verulus to follow you- some citizens of Markarth will speak to you as if you are a member of their cannibal cult. Even though you have not lured Brother Verulus to be eaten or taken part in the feast.
 * Sometimes when Eola comes up to you in the hall of the Dead and starts talking to you, the disembodied voice will keep on talking over her, making it difficult to understand what she is saying.
 * After you bribe Brother Verulus to follow you, he may not and the quest will be uncompletable, and by that time, he will be unkillable.
 * If you kill Eola just as you enter the cave, as in the notes above, the shopkeepers will not be hostile yet dialouge options will appear "You were at Namira's feast, weren't you?". There was no feast since she lays dead at the entrance. The quest marks as failed this way.
 * After you bribe Brother Verulus to follow you, the game may lead you to "Namira's Shrine" as the next quest objective instead of Reachcliff Cave which may be a typo. (XBOX/PC version)
 * (PS3/XBOX) If you elect to kill Eola the first time she is encountered in the Hall of the Dead, Brother Verulus may glitch, never leave Understone Keep, and constantly stop the player for conversation while he is in the keep.
 * If you kill Lisbet before returning her statue of Dibella, it will be impossible to drop. This quest can never be completed.