From publisher blurb:
The Red Priests of the Snake God suffered a crushing blow to their plans when they failed to take the small town of Thuil. Reeling from their defeat, they have returned to the deep jungles of Nolgur-Wul to regroup. The human villages outside the jungles know that it is only a matter of time before the Red Priests and their minions return. Now is the time to take the fight to them, deep within the jungles! The characters are urged to delve into the depths of Nolgur-Wul to track the Red Priests back to their clandestine temple where it is said a serpent queen, maiden of the Snake God himself, leads the growing cult. On the trail of the fleeing Red Priests, the adventurers find that a mysterious blight has recently begun to destroy the western jungles, villages, and all life within. What starts as a quick investigation becomes an unusual and deadly puzzle. More importantly, is this blight the Snake God's doing or something completely separate?
A moderately challenging adventure for three to five players, Island of Blight can be played using OSRIC, 5E, and SRS.