This feature was exclusively part of a joke version and is not currently planned for addition to regular
Minecraft.
Mines are worlds that are generated using the mine crafter, introduced in 25w14craftmine.
Each mine is generated randomly if a player chooses each mine ingredient.
Every 5 mines, a special mine appears in the mine crafter menu instead of the normal configuration menu. This menu does not allow the player to customize their mine; it just allows the player to start a pre-configured mine. A special mine contains waves of mobs for the player to beat, like silverfish, wither skeletons, skeletons and bosses like the wither, and allows the player to obtain special mine ingredients from them.
Dying in a mine results in failing the mine and respawning in the hub, where a large "mine failed" title appears.
Exiting a mine via the mine exit results in winning the mine. After spawning in the hub, experience orbs and occasionally (10% chance per mine), the shimmering key appears near the mine crafter.