The Glenmoil Witches

When Aela and I returned to Whiterun and entered Jorrvaskr, I was summoned to go see Kodlak.  I went down to meet him in his room. He had a mission for me, for a cure for the lycanthropy.  He told me the tale of Hircine and how some companions believe this to be a blessing, many including him believe it's a curse.  He didn't want to be left to servitude in the afterlife, he wished to join his brethren in Sovingarde, In order to do that he needed to be rid of this curse, and he found a way.

I had to go to Glemorial Cave where the four witches who had helped Hircine trapped these souls with their magic, Kodlak believed that if the witches head was sacrificed, the spell would be broken.
So I was to bring him at least one of the heads. I made for the cave with haste and and took out the few guards that protected the entrance. Once inside I crept through the cave, killing some small spiders with ease. There were four chambers each housing a witch. I decided that instead of grabbing just one head I would grab a second, to possibly cure myself.  I went through the first chamber and a fireball screamed through the air and hit the wall infront of me, I drew my bow and fired a shot blindly.

As I entered farther into the chamber the witch came into view. It was a Hag-raven, of the Forsworn, these four hag-ravens possibly made their own deal with Hircine and now lived in this cave entrapping the souls of Hircine's followers. It threw a second fireball in my direction, I rolled out of the way and drew and arrow, releasing it the hag-raven, threw another fireball this time hitting the arrow and as the fireball continued toward me the arrow had burnt up. I drew my sword and shield and charged at the hag-raven. It through a forth and final fireball as I dodged it and brought my sword across and into her neck.  I collected the head from the corpse, and there on the Table was another piece of Wuuthrad.  I grabbed the shard and went on to find the second witch. After my experience with the last one, it wasn't long before the second witch fell and I collected the head and left.