Leprechaun's Pot of Gold

Origin
Leprechauns are said to have a pot of gold at the end of their rainbows. They guard their gold with extra care, and trick people by telling them that the only way to find the gold is to look for a ribbon on a tree, and then tie ribbons on every single tree in the area. This pot of gold seems to have absorbed the greed of the Leprechauns.

Effects
When someone touches the gold in the pot, they will suddenly have intense greed and a desire to spend the gold. However, when the gold is spent, it will gradually turn into leaves.