Grimoire of Demonic Frenzy

Grimoire of Demonic Frenzy teaches Demonic Frenzy for the warlock's felguard. 
==Source== 
It can be purchased from:
* in Undercity for 
* in Stormwind City for 
* in Ironforge for 
* in Silvermoon City for 
* in Eversong Woods for 
* in Orgrimmar for 
* in The Barrens for 
* in Swamp of Sorrows for 
==Patch changes==
*
*
==External links==
Demonic Frenzy