At the end of the day, Michael decided to show the librarian the piece of paper he had shown his brother.
There were two reasons for that.
First, Michael was too curious to find out more about the language used by the Temple of the Forgotten. He wanted to obtain an answer to the question that had been tormenting his mind ever since he found the Temple of the Forgotten; How dangerous is the Temple of the Forgotten?
Michael wanted to know how much stronger he had to grow to raid the Temple of the Forgotten, and what kind of treasures he could find inside the Temple of the Forgotten. He was too curious not to ask others for help.
Second, Michael hated himself for overthinking too much. The Berserker Librarian couldn't really do much against Michael even if the Berserker grew interested in the Temple of the Forgotten.