Hello my minecraft ign is 24blocking and i found a dupe glitch pretty much you need to be on a server to do this tho so what you do is lets say you wanna dupe 10 mithril blocks so put the 10 mithril blocks in ya inventory then go into a anvil get a arrow and put it on the first slot then turn your wifi off then back on and log back in then you wil have 20 mithril blocks