 In "Crystal Mask", Frazhin created a khiz mining operation in The Sunless Valley, and built the Khizalace out of the crystal.He also used a pair of khiz masks to communicate with Yashra over long distances, and to allow her to wipe people's memories, and a piece of khiz crystal was placed in Kherron's throat to disable his singing voice.In "Dark Quetzal", placing khiz in nests is used to make Half Creatures loyal to Frazhin, and khiz is shown to be able to control the quetzal Memoryplace, both as a khiz spear and as the Fane, a giant ball of the crystal which Frazhin seals himself inside.