The command block will allow you to get a reduction potion that you can get in various remote locations or random structures. This can be made from a flask and cactus fruit. It is not difficult to prepare it, but it gives a huge opportunity.
How to use Shrinking Potion
- Copy the command text from a file (Ctrl+A -> Ctrl+C)
- Launch the game and get a command block, to do this type in console /give @p command_block
- Put the command block on the ground
- Click on it right click and paste the command in the “Command console” (Ctrl+V)
- Activate the command block using the button or the lever