This mod is an addon for Item Stages. It adds a single item, the Pouch of Unknown.
ItemStages has a bug where you can just put the staged items in an anvil, rename them, and they will be unlocked. This mod might be a workaround for the issue.
It has a default recipe, but you can change it with CraftTweaker anyway.
When this mod is installed, you cannot hold any locked item in your inventory, they will be dropped to the ground unless you have a Pouch of Unknown.
If you have a Pouch of Unknown in your inventory, all of the locked items will be put into it. You can't take out these items until you have the required stage unlocked.
This mod is configurable.
Also it requires ItemStages for obvious reasons.
