Herka discovered that other species of monster could be used to power the Quartz Rod. She sent you after Thurzon the Undying, a powerful undead in the Forgotten Storeroom. You defeated it and recieved the Magical Essence, which was finally able to recharge the Quartz Rod and activate the Rift Orb. The Orb opened a portal to the Prison of Ice. Richelle had high praise for your dedication.