Issik's Maze can be found north-west of Serpent's Fang in the past of Serpent Isle.
Issik created the maze to challenge warriors of Order, but upon completing his magical creation, became trapped within it, thus never passing on the key to beating the maze.
The maze is comprised of three levels, which are navigated by walking into a room and allowing a doorway to open in another wall. However, the Avatar can become trapped within the maze if all doorways close when the particular cell is entered.
Yurel can be found in the last level of the maze, and for a piece of cheese, he will allow the Avatar to take the purple Orb necessary for unlocking the door to the Silver Seed.
Another item of note found within the maze is the Helm of Light, a magic item which when worn, removes the need of torches.