From publisher blurb:

An Adventure for 6th- to 8th-Level Characters

When Science is Lost to Horror ...

Deep inside the hallowed halls of Grimm Thorpe University, a grim line is crossed when a professor's experiments in alchemy and magic transform innocents into grotesque monstrosities. The power of transmutation is enticing, to say the least -- those who re-create the created know what it is to hold the mantle of godhood, if only for an instant. But a chance at godhood often leads down a crooked path to damnation ...

Unhallowed Halls is an 80-page OGL adventure for 6th- to 8th-level characters. It includes:

• Details on the mystic PC class, which uses divine magic to receive strange visions, or portents, of the present and the future
• Stats and a template for the nightlings -- ravenous once-human alchemical creations with black, chitinous skin and a dangerous gaze
• An appendix of personalities to guide PC investigation at the university