Purity

Objectives

 * Cleanse Vilkas of his beast blood
 * and/or cleanse Farkas of beast blood

Requirements

 * Must have at least one Glenmoril Witch Head in inventory.
 * Must complete at least one Radiant Quest from Farkas or Vilkas, after completing Glory of the Dead and having Glenmoril Witch Heads in inventory.

Description
After completing Glory of the Dead, you can return to Jorrvaskr and talk with any of the three remaining members of the circle, Aela, Farkas, or Vilkas about various Radiant Quests like the Animal Extermination mini quests.

You must have the Glenmoril Witch heads (see Blood's Honor) in your inventory, before accepting a radiant quest, or Purity will not show up. Either the first or second time you talk to Farkas or Vilkas, they will ask you to help them on a quest of a personal matter. You can choose to go with them back to Ysgramor's Tomb and perform the same ritual you did with Kodlak.

Trivia

 * If you stored the witch heads somewhere and take them after completing a few radiant quests, Purity will not show up immediately, when talking to Farkas or Vilkas. You must first complete a radiant quest from each of them, with the witch heads in your inventory to make Purity available.
 * When asking from a job from either Vilkas or Farkas, if they have the option "Is there any work to be done?", they will offer you this quest.