Secret of the library -2

Behind that door was a secret passage fully covered in dust and darkness. There was not a single ray. Arielle was a brave girl while our hero Owen was just coward hiding behind her back.
They started walking in that dark passage blindly but it was easier to guess the direction, as there was a solid wall on their right side. Arielle was just following that wall she knew that this wall will lead her to the end. At the moment to make a situation lighter Owen tried to start the conversation but Arielle stopped him saying we are at unknown place and blind so she asked him to look out for danger. And it was natural for them to be frightened but they had trained their body so it was not that much harder. After half hour they saw light. Something was shining at end of passage. As they were going towards it the image becomes more and more clear.
It was a giant door fully made of highest quality iron and on top of that there was beacon for the purpose of light may be but that beacon was strange. Arielle pointed that out saying," Owen don't you think this beacon is strange ? "
Owen took a closer look at the beacon and said "it doesn't look that strange to me but it has an irregular shape."
" no Owen, look at it close. It doesn't have external magic...