THE SOLUTION.........

They were all surprised by Aaron and his magical skills. Then Aaron asked them to wait outside while he gets the book. Aaron's library was filled with rare books and scripts. That is the reason, he cast a spell there. The spell stopped everyone except Aaron to enter it.

.................Few minutes later Aaron returned with a big and heavy book. The one who sold the book to Aaron, told him that the book was more than 1000 years old.

He placed the book on the table. Shockingly he remembered on which page was the solution written. On page no 1034, there were some sketches of what could have happen that day. In the last paragraph, it was written that if somehow weapon's effect is finished and the spirits that feed on the souls of the living are returned, then the one who are suffering should try to made the weapon again.