Timber Lord (Silly Edition)

Timber Lords are the ultimate murderers of trees, and only the most murderous and sadistic of tree-killing Orcs get to become one.
The Timber Lords were trained by Saurfang himself, because while everyone were killing each other, nobody were killing the trees, so he trained them in order for the trees to have something to fear apart from those who needed shelter. Timber Lords have existed for a long time, and predates World of Warcraft. They are a Hero class that is unavailable to the majority of players.
The reason Blizzard said Death Knights were the first "Hero Class" is because they didn't know of the Timber Lords, but in Warlords of Draenor Saurfang revealed it to them, and demanded that they created Timber Lord NPCs as a tribute to his grand work. 
Timber Lords will generally only attack trees, but may attack others if provoked. Luckily, as they are invisible to most due to their permanent stealth passive, and level cap of 30 levels above what players can achieve(it has been like this since the original game), you rarely see them. Timber Lords are among the deadliest foes in existence, and is matched only by Saurfang himself, and, to Saurfang's annoyance, Crowley. But apart from that, Timber Lords are the deadliest combatants in Warcraft, and can easily beat Sargeras in an arm wrestling competition(a statement which is based on fact).
The first Saurfang fact was created by a Timber Lord in Saurfang's honor, and has been on Saurfang's friendlist ever since.
Little is known about Timber Lord abilities, but it is known that their class consists of a DPS spec, a Tank Spec, and a Tree-Killing Spec(which is extra good at killing trees).
The only motive of the Timber Lords is to seek out and chop down as many trees as they can, and as such, they have their own PvE content, which generally consists of killing trees.
The Timber Lords have luckily been forbidden by Saurfang to chop down Nordrassil, but they did at some point chop down Teldrassil, which is the true reason for the tree being destroyed. It is rumored that Teldrassil was part of a Timber Lord-specific world event, in which Corrupted Teldrassil was a boss. The reason no players ever witnessed this, is because the game was released for the Timber Lords several months before it went live for the rest of the world.