Warden tells you, "At the edge of the Lost Wish Mountains outside Arwic you'll find the Mite Maze."
Warden tells you, "The chittering shreiks of Mites have long tormented the ears of adventurers."
Warden tells you, "These creatures assaulted the reclusive pyromancer Branith, a member of the party that slew the One Queen, and made off with his possessions."
Warden tells you, "Navigate the Mite Maze, find the artifacts of pyromancer Branith. Return and show one of these possessions to me for a reward."