This item is the result of the Ogre Shaman Guild Summons quest. Turning your starter Tattered Note (Oggok Shaman Guild Summons) to Zulort rewards this tunic.
[Mon Jun 29 10:01:24 2020] Zulort says, 'Take, take... You now Shaman of War... Zulort make you majik, too. When u [gonna help] u tell Zulort. You return to me when you stronger, I teach you many things I know, including how to start working in the various [trades.]'
[Mon Jun 29 10:01:24 2020] Your faction standing with Shamen of War has been adjusted by 100.
[Mon Jun 29 10:01:24 2020] You gain experience!