Eye of the Beholder II: The Legend of Darkmoon is a 1991 computer role-playing game and the sequel to Eye of the Beholder.
After the adventures of the first game, the heroes head to a local inn to rest and enjoy their new found fame but a note gets slipped to them from Khelben "Blackstaff" Arunsun, Archmage of Waterdeep, who says that he sent a scout to investigate reports of evil brewing in a temple known as Darkmoon but she has not returned. Khelben then transports the heroes to the temple to find Amber and continue the investigation. While battling their way through the temple's clerics and other inhabitants, the players discover that the high priest, Dran Draggore, is assembling legions of skeletal warriors to attack Waterdeep. The players need to pass an acolytes' test to gain access to the inner parts of the temple. In the final confrontation Draggore turns out to be a red dragon. - via Wikipedia.