Here is another installment of exTRAPaganza, our Thursday over-the-top trap series.
A large pile of treasure is hidden in the bowels of the castle. If it is touched, it turns out to be fake gold and worthless. However, the person taking it is not cursed. Anything that he touches that is made of a non-magical precious metal turns to a worthless metal. This has to be removed via remove curse or some similar effect.