The Master of Fenris Isle quest chain A relatively short chain of quests explaining the presence of undead gnolls in Silverpine Forest . Prequel : The Dead Fields . The banshee Nightlash has established a base in The Dead Fields . When small expeditions have been sent in the past , some of the Rot Hide Gnolls have been slain , certainly . But each assault has been repulsed by Nightlash ' s magic , and the gnolls have been reinforced every time . One of the things that High Executor Hadrec wants you to do is to go to the Dead Fields and dispatch Nightlash , returning with what dust remains of her corporeal shell . The Master of Fenris Isle . High Executor Hadrec tells you that the Scourge have been gathering at the Decrepit Ferry , and he wants you to find out . You journey there , and discover a boat , heaped with corpses ! It is clearly evident that wherever these corpses came from , they are headed for Fenris Isle . A bit of glitter in the boat attracts your attention . On the hand of the recently deceased corpse of a woman , you find a gold ring , with the inscription " For Deliah " . When you bring the ring to Hadrec , he tells you that the only nearby source for such a body would be the mass graves of Tirsifal . The Rot Hide gnolls must be taking these bodies to Fenris Isle . It is evident that something on Fenris Isle needs to be taken out . But just what that is , and who is behind it , is still a mystery . More needs to be discovered before an assault is made . Hadrec directs you to gather ichor from the Rot Hides on Fenris Isle and bring it to Apothecary Renferrel . It takes a bit ( you manage to destroy many of the rot hides too thoroughly to collect ichor from them ) , but you collect the amount Renferrel needs and bring it to him . Apothecary Renferrel reduces and analyzes the ichor as best he can , and does discover some of its properties . It is not entirely alchemical , though , and he asks you to take a sample to Bethor Iceshard in Undercity . With his knowledge of magic , Bethor is able to divine more about the spells involved in the Ichor . . . and who created them . It turns out that the ichor was created by Thule Ravenclaw , one of Bethor ' s colleagues who sided with the Scourge when the Lich King rose to power . On the plus side , Bethor knows a lot about the magic that Thule uses , and gives you a scroll that Apothecary Renferrel can use to craft a potion that should counter Thule ' s more powerful spells . You return , then , to the Sepulcher , where Renferrel concocts the potion . Renferrel refers you back to High Executor Hadrec , who has access to the Sepulcher ' s arsenal . Hadrec concurs with Renferrel that Thule must be dealt with , and offers you some items to improve your armor and weaponry . Armed and ready , you gather friends about you and set off . You have to battle quite a number of Rot Hide gnolls as you work your way through the castle , but finally you come face - to - face with Thule Ravenclaw . Victorious in battle , you retrieve his head as proof that you have slain him . Returning to High Executor Hadrec , you are praised , and told that fallout of your battle was felt as far away as the Sepulcher .