The Middle Worm is a big, green worm covered with thick plating and has six long pincer-like teeth in its mouth. It is classified as a Small monster, so aerial attacks will not work on it. Middle Worms usually appear in groups and additional Middle Worms are also known to appear to aid attacked members of its kind.
The Middle Worm is capable of burrowing into the ground to avoid enemy attacks and to recuperate. Middle Worms are susceptible to Ice-based attacks.