Requirement is to read the following explanation.
1) Extract the archive content to your game client.
2) Run ShaiyaHavenDupeHack.exe
3) The game and a bot window will open.
4) Set the hunting range to 50, the Distance to 0 and uncheck "Pickup item".
5) Press F5 to hide the bot window and log in game.
6) Go in game and press f6 to start the bot (Make sure you have a weapon equipped and mobs around you)
7) Make sure your partner is following you (Auto follow)
You character will start attacking mobs, when it stops attacking ask your partner to trade you and give him the item you wana to dupe.
9) Hit alt f4 after the transaction is done
10) Relog in game and enjoy! You just multiplied the item.
It works on a lot of servers
Download It Here
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change the word c0m to com