World of Warcraft Quests involving The Duke of Fathoms:
Alliance & Horde
Screecher Spirits - (Step 1) Capture the spirits of 3 screechers in Feralas, then return to Yeh'kinya in Steamwheedle Port.
Stratholme Alliance & Horde
Dead Man's Plea Go into Stratholme and rescue Ysida Harmon from Baron Rivendare.
Silithus Alliance Quest
The Four Dukes Find a way to summon and slay the Duke of Cynders, the Duke of Fathoms, the Duke of Zephyrs and the Duke of Shards and report back to Commander Mar'alith in Cenarion Hold. You must also bring Tactical Task Briefing V in order to complete this quest.