The Witchwar Legacy is an adventure for 17th-level characters, written for the Pathfinder Roleplaying Game and compatible with the 3.5 edition of the world's oldest RPG. The adventure features an icy necropolis frozen in time, cursed dragons, twisted giants, and the fell magics and devious riddles of the Queen of Witches herself! It also includes a description of the frost giant fortress of Holvirgang, and a new monster, the extraplanar scions of the titans called the Abyss gigas. This adventure is set in the northern reaches of the wintry land of Irrisen in the Pathfinder campaign setting, but can be easily adapted for any game world.