In the Dungeons & Dragons fantasy role-playing game, the su-monster is an ape-like magical beast. They resemble large monkeys with gray bodies, black faces and tails, and red paws/feet. Their limbs are tipped with sharp-claws, and their faces usually bear a fiendish, toothy grin. Su-monsters were supposedly created from a hybrid of primates and humans by a mad mage to protect his personal forests from psionic intruders, but the foul creatures have since killed and broken free of their former master, and now pursue their own lives.