Umbranse the Spiritspeaker is a human male who lives out in the snowy hills of Winterspring. He can be found in a small building northeast of Everlook [67, 27] in a camp he shares with of the Wintersaber Trainers.
The that starts with defeating the Shade of Eranikus ends abruptly with Umbranse. Although Chal Fairwind is PvP flagged Alliance, if you are Horde and you have the quest  Umbranse will speak to you, and Chal will not attack you unless you attack her first.
Blizzard representatives have hinted that the quest chain will be extended in the future. As of Patch 3.3, the chain still has not been extended.