[16] Thule Ravenclaw:

Bring Bethor's Scroll to Apothecary Renferrel at the Silverpine Sepulcher.

Bethor Iceshard: This Ichor was crafted by an old colleague of mine: Thule Ravenclaw. He was a young, promising mage before the great war, but when the Lich King rose to power, he betrayed his brethren and allied with the Scourge.

I did not realize he still lives, nor that he leads the Rot Hides in their forays against us!

I know many of his spells, and can help concoct a potion to counter them. Take this scroll back to Apothecary Renferrel. It has the incantations needed for the potion.

Apothecary Renferrel: Greetings, Yohaan. What did Bethor have to say?

Apothecary Renferrel: This scroll is laced with powerful magic. I've never used such forces in a potion ... it will be a powerful mixture, and should serve you well should you attack Thule in his stronghold on Fenris Isle.