Giant spider-like creature. From the ground to its back it's about five and a half feet tall, and snout to rear fifteen feet long. Its second legs have been modified into wing-like blades. They're usually kept against the side of the body, but they can be twisted to the front and used to deliver a dual karate chop.
"Arachnae" is actually a temp name, but it looks like I'm going to settle on it since I haven't come up with anything better.