Its pretty simple(Ok i am a Bad Explainer so my Explanation might be complicated). So you get a Essence. Any Essence you want you only need one(works with other Items too). Then you go to the Blacksmith or any other NPC that you can trade with. So in the Trading Screen first sell your Essence with left click. Now the NPC your Trading with has it. So now Repeat this: "1. Right click on the Essence(s) the NPC has that you just sold them. Then a Menu will pop up where you can select how many you want to buy from him. Pull the Sider to the left until it says Zero(I think its always on Zero to beginn with). And click confirm 2. Now you have your Essence! But you have Zero of them. Just left click on the Essence to sell it back to the NPC(You will still get Money). Now the NPC has one more Essence than he had before!" Now repeat until the NPC has the Amount of Essences you want. By the way the Buy Price of the Essences is 240 and the sell price is 200. So if you buy all the Essences you just duplicated the NPC will still have some left so you gotta duplicate more than you actually want so you get the Amount of Essences you Want. I hope my Explanation was understandable.There’s a dupe glitch? …. How you do it?