If anyone is wondering what this is, imagine a huge werewolf, but it's not a werewolf. It doesn't have a snout, but it's still a beast nonetheless.
It's arms are about five feet long and it usually uses them for support. However, it's legs are capable of supporting its upper body enough to stand still and swipe around. It keeps it legs, which are just barely shorter than its arms, reered back so it can leap very far. This thing can leap around with blinding speed, its claws can dig into the side of the keep's walls, and if the claws so much as tap you your skin is liable to rip open.