Hey guys! This is a duplication glitch i have found while playing terraria mobile. Its super simple too! All you need is 2 people on the same world. Get a barrel and get both players to enter it. Now place the item you want to duplicate in the barrel. Simultaneously take the item, you both should now have the item. Put it back and repeat. Each time doubling the amount! Hope you guys like it! Please note, if you do this it may ruin the game for you! Be aware after you do this the game will NOT be as fun.