Verdigris (n.): a blue-green rust that tarnishes ageing and forgotten copper coins, altering them entirely
One evening, Ryan and his friends steal some coins from a well. Soon after, strange things begin to happen. Peculiar burn marks appear on Ryans knuckles and light bulbs mysteriously explode. Then the well witch appears, with her fountains for eyes and gargled demands. From now on the kids whove stolen from her must serve herand the wishes rotting at the bottom of her well.