Adding a new feature to cursed towers in the form of the ghost of a lost/killed crusader (Sir. Marcus Meridius or Marcus Petenetrator of the Tower, or something like that) riding a horse appearing randomly after 15 minutes of being on the tower. A greedy crusader dies while searching for treasure and his horse has bags full of gems, they would drop after killing him a guaranteed 1-3 gems per day. Additionally, it would be able to drop scrap/legends/shards.