Orc tribes are feared and reviled throughout the planes for their depravities and their penchant for destruction and mindless violence. The vast majority of orcs are easy enough to identify by their jutting jaw, yellowed tusks, squinting eyes and hairy, brutally muscular frames. Their skin color tends to run the gamut from blue-black to grey, with putrid slime-green being the most common. Many tribes of orcs, however, have adopted traits unique to their own species through interbreeding with other races, adaptation to climate and terrain, and the intervention of evil magicians or other-planar powers.