A pit fiend is a devil of the highest order in Dungeons & Dragons. These foul creatures stand at the very top in the hierarchy of the baatezu, commanding their armies and bullying lesser devils into total submission. In the Nine Hells, the authority of pit fiends is surpassed only by the Archdevils.
Pit fiends appear as bestial, scaled humanoids twice the height of any human being with a pair of wings that it can wrap around its body. As venom drips from their fangs, fire wreathes the pit fiend's entire body. When mortals think of devils, the pit fiends are the creatures that are brought to mind. These creatures appear to be large humanoids with brilliant red skin. Their heads are adorned with massive horns while their bodies are cloaked in a pair of bat-like wings. A long, prehensile tail snakes from their backside. The mouth of a pit fiend is filled with sharpened fangs whose bite carries both a terrible poison and a virulent disease. A pit fiend stands over 12 feet tall and weighs 800 pounds.
Armed with superhuman combat prowess, the intelligence of a mighty wizard, an array of powerful spell-like abilities and usually the resources of a devilish army as well, pit fiends are incredibly dangerous foes. Powerful conjurers can summon a pit fiend to make deals. Contracts are usually written up in order to have the deal honoured, but pit fiends are masters of such things and always have ways of perverting the contract to their own ends.