Describe the item that Monica gives to Harry as the only thing that Victor left behind when he left home.

The item is a dead scorpion. It is on the end of a necklace and the tail is hooked over the necklace so that the scorpion faces head down with the feet pointed toward your chest. Harry explains that the feet would always be prickling at your skin and that the tail might sting anyone that got near it. Harry is unable to determine what kind of spell is attached to it without using it and is afraid it might be dark magic and so leaves it alone.