An unexpected discovery

Tom and Mary have found an ancient medallion in an antiquary shop and that same night they even found that was magic with the bodyswitch power. It was very funny to be each other all the week long but when they decided to swap back they found it was lost. That day Tom went out from Mary's office for the lunch break but before eating he went to the public library in order to get much more information on the medallion. So he took a book on the magic artifacts and discoverd with much pain that another properties of the object called Zulo was disappering much frequently.