that question always comes back because on the official website there is a page where they say it'll give special abilities....
like this one here
http://www.silkroadonline.net/gameinfo/tr_triangularcs.asp wrote:
Thieves in Silkroad can raise their thief level by gaining experience received from attacking merchants, transports, and hunters. When thief level is increased, attacks done to merchants, transports, and hunters become stronger. Thief levels are categorized into 7 grades.
but meh...isnt added yet
