Hellmarsh's Monastery

From the introduction: A former bastion of light, the monastery in the marsh, lies now in ruins. It’s unknown why this place succumbed to the darkness, some people say that the last abbot went mad and murdered his brothers while others say that the monks became corrupted by the same abyssal forces they watched over. Anyway the monastery is currently roamed by a degenerated race of swampdwellers, bandits, goblins, the undead, a doomed wizard and, of course, adventurers.