when you hand a tattered note to your guildmaster you get this item. for me (shaman troll, follower of Innoruuk) after handing the note to Kaglari:
Kaglari says 'Good... Kaglari need your help... Kaglari teach you majik now. When you ready for task you tell Kaglari! Yooz reeturn to mez when yooz ar strongur, mez teech yooz bout da mor advanced tings.'
Your faction standing with the Dark Ones has been adjusted by 100
Your faction standing with Shadowknights of Night Keep has been adjusted by 25
Your faction standing with Frogloks of Guk has been adjusted by -15
You gain experience!!