the Great Gubal Library (Hard)

Your reputation clearly precedes you, as a mysterious client would call upon you─and you alone─for the formidable task of retrieving a particularly rare volume from the deepest, most forbidding halls of this long-abandoned storehouse of Sharlayan wisdom. Though the mind boggles to imagine what eldritch horrors and sorcerous abominations now wander its halls, one thing is certain: they are not like to take kindly to the presence of a warm-blooded would-be book burglar...