This could get you banned easily so be careful when using it. Open your inventory and click on the item you want to duplicate. (For this part you need to be lvl 50 or higher) Then press "Enter" and type go/ Noria. Don't press enter again. Since you are holding the item, you need to left click and press enter at the same time. AT THE SAME TIME!! If you don't time it correctly, it won't work.