Seven Years in Darkness: The Shamir Worm #1

Late at night in the city of Scholomance, a group of locals scheme to overthrow the school of Black Magic and kill its students. Zero has been watching, however, and plans to unleash The Shamir Worm on this underground city. The Shamir, a creature of extraordinary power, hasn't been seen for thousands of years and has never been used for such nefarious purposes... until now.