Rhinag

Rhinag was a level 8 quest giver located in the building at Rocktusk Farm in the orcish starting zone of Durotar. He was removed in patch 4.0.3a.

He once started the quest.

Speculation
As he Rhinag was removed from the game it is possible from a lore perspective that he was not found after being stung by a Venomtail Scorpid or was found but was not given the Venomtail Antidote in a timely manner.