Torment of the Worgen
From WoWWiki
Torment of the Worgen is one of the books that can be found inside Sealed Tomes in the Guardian's Library in Karazhan. Using it grants you a 60 minute buff, giving your ranged and melee attacks a 3% chance to transform yourself into a Worgen, dealing 200 additional shadow damage per hit, lasting 10 seconds.
Contains
Using the book generates [Singed Page] in your inventory.
