It is blind and tracks by smell. They smell rotten, like garbage and are incredibly fast. This demon is not a figher, it is mainly used as a spy or a messenger (implying it is capable of human speech). It does not suck its victim's blood. Drevak demons do have teeth,but they usually bite with some poisonous black spines in their mouths. Drevak poison is incredibly painful and poisonous. A Devrak attack is called a "Devrak sting"