Dungeons & Dragons: Shadow over Mystara

After defeating the Arch Lich Deimos, the heroes continued on their journey through the Broken Lands of Glantri upon realizing that Deimos was only part of an even greater evil plan, and he was in fact being used by a mysterious sorceress named Synn, who appears to be a young woman, but commands a powerful magical abilities, has been scheming to control the Kingdom of Glantri and conquer the humanoids of the Republic of Darokin. After Deimos was defeated, Synn vowed to punish the land that she desired. At the game's end, the player discovers that Synn is in fact a centuries-old red dragon, determined to harness the mystical forces of the lands she has conquered, in order to awaken a creature of even more devastating physical prowess than herself - known and described only as The Fiend. The heroes then fight against Synn in her lair. When she is slain, her monster is also destroyed by an airship bombing.