Journey to the Sacred Mountains. There, Kirjonen will meet you and discuss the plan - he and the client will drive out the Blizzard King, and while it roams the Sacred Mountains, it will drop Ice Crystals, 5 of which are needed to complete the quest. Once 5 crystals are obtained, meet Kirjonen at the marked rendezvous point to complete the quest. Do not return to town or the Ice Crystals are automatically sold.