You are a knight, waking up one day with the unpleasant surprise of finding a spiky ring around one of your finger. You don't know how it got there but no matter how forceful and the dose of soap you used, you cannot get it off your finger. On the contrary, the more you try, the tighter it become, his metal thorns prickling your skin menacingly.

You have a gut feeling that you must take it out at all cost, a dark energy emanating from it.