Shriezyx are gigantic deformed spider-creatures, long since detatched from their original purpose. They creep and infest the caverns and sewers and ruins underground, ambushing and devouring prey. These eight legs of terror were once created by a mad wizard but now they populate the Underdark or wizard labs.
These beasts are immune to mind effects and fear fire. They have a poisonous bite and their web can cause slowness.