Death of the Sinner

From the introduction:

The Vantærum Academy was created for the training of Holy Warriors. The Dean, Arbatarius Vantærum, labored to magically amplify an artifact called The Orb of Judgement in an attempt to banish all traces of evil from the land. Instead he unleashed the power of Unholy Judgment which devastated the Academy. The land around the Academy, once fertile, is now blasted and forlorn, with tormented undead roaming ceaselessly. Mostly in ruins with its three top stories shattered and collapsing, the only discernible entrance to the Academy leads down into the subterranean Temple area.