Final volume (Darkenheight, 1996; A Breach in the Watershed, 1995) about the struggle between good-guys mundane Dalethica and magic Faerine against Duloth-Trol and its evil god Dassadec. Mountaineer Rudy Appenfell and his beloved, Raine, now both transformed into magic warriors, learn that Dassadec has an actual beating heart--the evil-magic Heart of Darkblood, buried deep within a black mountain--and that only by destroying this heart can they kill Dassadec and rout his wicked Minions. An agreeable conclusion for fans of the series.