This quest is not available in game.
Travel to Durotar and speak with Ki'ta Arrowtusk in Sen'jin Village.
My dream brew can only tell me so much. Its visions are scattered in time and space. But it is clear that a showdown is brewing amongst the Horde.
In my dream brew I see that the troll Vol'jin of the Darkspear has already travelled to Durotar to defend his people. He is accompanied by Chen Stormstout, the brewmaster from the Wandering Isle.
If I have learned anything about Chen, it won't be long before he brews up some trouble... You should hurry!