The banner of the Black Tooth Grin Clan
Leaders: Rend Blackhand and Maim Blackhand
Clan Colors: Black
The Black Tooth Grin Clan was originally part of the Blackrock Clan but after Blackhand was deposed as Warchief, his sons 
[Rend] and Maim sought to establish their own power base within the Horde. Rend and Maim, leaders of the clan, were also the ones who assassinated the parents of the New Horde's Warchief Thrall on the orders of Gul'dan. During the Second War, the Black Tooth Grin was responsible for guarding the Dark Portal and fought on the front lines during the campaign for Khaz Modan. The clan receives its name from the tradition that every recruit must knock out one of their own teeth to show their loyalty.
Side Note: "Black Tooth Grin" was also a phrase sang by Dave Mustaine in a song for the popular metal band Megadeth. The phrase became popular after Pantera guitarist and prodigy "Dimebag" Darell Abbot created an alcoholic drink named the "Black Tooth Grin" and even tattooed the phrase on his leg.