Push it to make the rune appear, then click on the rune itself to pick it up. After finding the rune doorway for each mission, head through the doorway and along the path to find another button. I recommend playing each story mission on the lowest difficulty tier available for that mission on Default difficulty. The runes hidden in story missions are only used to open the door at the back of the fort and can be found on any difficulty level. To access the fort in the camp where the secret level map is located, you must have completed Minecraft Dungeons at least once.
How to unlock the secret cow level in Minecraft Dungeons.This Minecraft Dungeons runes guide will list the steps you need to take to find all nine runes in each of Minecraft Dungeon's story missions that are required to unlock the secret cow level. You will need to find nine hidden runes to unlock this hidden level, and once you do you'll get access to the craziest secret area in the game. In an homage to the long-standing bovine rumour and Easter Egg in the Diablo series, it seems that Minecraft Dungeons has its own take on the secret cow level that's filled with Mooshrooms. You may have heard the rumours about a secret cow level in Minecraft Dungeons.