How to Duplicate item?
Here's the Guide
1.Add friend the bot or the Admin of this group
2.After you add friend, Invite to trade the bot and put your item you want to duplicate (NOTE: Only Rare,Mythical,Legendary,Immortals and Arcana is available,) Minimum of 3 items and Maximum is nothing
3. After the trade just wait 2 minutes to duplicate your items
4.After 2 minutes Invite again the bot to trade and bot give yor items and thats double

Have Fun! Happy New Year