The demon smiled, "Oh, it's quite simple, really. Arisieu built this tower to watch over the valley beyond, and he collected a wealth of knowledge on many subjects, yet much of it was...sensitive. He did not wish it to fall into the wrong hands; of plunderers like you or infernal being like myself."<br/><br/>"So, his seals on the place may only be broken by a being of 'good will.'" The demon continued, "And not merely by parading some paladin into the tower will it work, either. No... He set forth a number of tests that would allow only the one who passed them within."<br/><br/>"Though...There was another way in,<em>that he never told me.</em>" The incubus grudingly remarked.