So, Kael sent you. The surface world grows restless. I've felt the tremors of corruption from up there, but down here, a different kind of heat is rising. The Witchburns are becoming more aggressive, and they're not just guarding the passage, they're spreading within the first caverns. I need to understand why. Bring me 10 Pure Flame Essences from the deepest of the Witchburns you can find in the Volcavern Passage.