Category:Dark Troll

"The dark trolls (a.k.a. dark forest trolls[3] ) are the tallest and rarest known species of trollkind.[1] Some have decided to classify this species as the fifth category of trolls.[4]

During the Battle of Mount Hyjal a clan of dark trolls joined the night elves and fought against the Burning Legion, helping for the salvation of Azeroth.[5] "

http://www.wowpedia.org/Dark_troll