Tome Warden

This living shelf collects valuable tomes, which it has learned its magical spells from, and hides in waiting for any creature unfortunate enough to walk by. Unwilling to part with its valuable sources of knowledge, this construct will fall on any unsuspecting victims, crushing them to death. The shelf appears to lose its balance, falling on library goers as they pass by. The Tome Warden can still attack from the ground against anyone foolish enough to try and save their restrained friend.