What about an illegal drug introduced to Yliakum. Something that is frowned upon by the general population, but a chance for evil to make a little money, illegally. Maybe a certain herb or powder, that you can eat. it alters the way you walk, talk, see things... maybe even a potion. something that say, makes your strenth grow, but agility and endurance drop. something stat altering as well as imparing the charactor. it can be introduced as something not welcomed in the land, but people still push it to make trias. maybe something thats hard to come across. just a thought.