Execute Mavon Drenim in Vivec.
- Talk to any of the Morag Tong Masters at the guildhalls for a new writ.
- Go to the Telvanni Canton to execute Mavon Drenim.
- Find Mavon in the Telvanni Tower and kill him.
- Return to any of the Masters to complete the quest.
Mavon is the ranking Telvanni noble in Vivec, and can be found in the tower of the Telvanni Canton and is a powerful spellcaster who will attack the Nerevarine as soon as entering, along with the two other mages in the bedroom.
Return to a Morag Tong Master and receive the payment of 1000 gold.