Such mirrors can be found in various video games like Terraria, but the property of these mirrors is slightly different. Once in the lower world(dungeon) use one of these mirrors and you will instantly be able to return to the surface of your world. A quick teleportation from one point to another, only without the ability again to teleport to the starting point.
How to install Magic Mirror
- Download and install Minecraft Forge
- Download mod
- Do not unzip it, copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods