Multiplayer

Open the chest, then have a friend get on the donkey. Put whatever you want to duplicate in the donkey’s inventory, then have your friend log out. The donkey will leave the game with them, but you’ll still be in it’s inventory. Take out whatever you put in, and when your friend logs back in, the donkey’s inventory will be the same as when they left, so you now have two copies of whatever you took out. That’s it, you can do it as many times as you like!