Blueprints are used to craft specific locked items.
USAGE
Blueprints will add recipes to your recipe book.
Simply look up the blueprint's recipe in the recipe book(crafting table only).
The blueprint must be in the inventory when crafting its specified item and is consumed upon crafting.
NOTE: Some recipes may appear in the uncraftable section regardless of ingredients being in your inventory.
OBTAINING
Each blueprint is different, but most of them are sold by the residents of the twisted village.