Amulet of soulsbind

A small amulet depicting yin and yang. There are only two of these artifacts discovered. When two beings touch their amulets together, they form a magical bond. When one of them dies the other dies also, but when one gets stronger so does the counterpart. If one of the characters goes unconscious the other is uninfected, unless the other holder dies. When one holder levels up so does the other. When a character is unconscious and fails a death save the other holder automatically fails their death save as well. 

Notes: successful search for another being with a duplacate of this item.