Castle of the Worm (Quest)

Castle of the Worm is part of the main quest in the Elder Scrolls Online.

Description
The Souless One returns to the Harborage to find an unexpected guest- Abnur Tharn. He claims to know where Sai Sahan is but will only speak to the Souless One. He requests asylum in exchange for the information.

The Souless One lands in a village of Soul Shriven and may choose to ask Cadwell for help. They enter through the Cistern and make their way to Abnur Tharn.

Tharn says Mannimarco's plan is to become more powerful than Molag Bal and replace him. Mannimarco wants to trap Molag Bal's essence with the Amulet of Kings and absorb his power.

As they are escaping, the Souless One can choose to bring Cadwell to Tamriel or let him stay in Coldharbour.

Back in Coldharbour, Tharn reveals that he doesn't know where Sahan is, only that he is Mannimarco's prisoner. Lyris punches him.

Objectives

 * Talk to Abnur Tharn
 * Enter Coldharbour
 * Talk to Abnur
 * Talk to Lyris
 * Find a way into the castle
 * Go to the Cistern
 * Talk to Cadwell
 * Follow Cadwell
 * Enter the Tower of Bones
 * Find usable atronach parts (4)
 * Deliver the atronach parts to the laboratory
 * Read from the ritual book
 * Wait for Flesh Atronach
 * Find Abnur Tharn
 * Defeat Mannimarco
 * Talk to Abnur Tharn
 * Flee the tower summit
 * Talk to Cadwell
 * Flee the tower summit
 * Flee to the Harborage
 * Talk to Abnur Tharn
 * Observe the scene
 * Talk to the Prophet

Reward
Signet of the Worm, 370 gold and 1 skill point