The gnome merchant replies; "If you let the toy mana be exhausted completely, it cannot be recharged nor renewed ever again. It becomes then a mundane item, in that ball case, just a glass ball. A very fragile ball, as over time dungeon goods that have lost mana, will lose their structural integrity and toughness and crumble then eventually to dust. But as mentioned, in Azure city there is plenty of artisans who can do temporal boosting or permanent enchanting items depending on how much gold you have. Also visiting a dungeon and spending an hour there also renews mana on dungeon goods. These universal rules apply to all dungeon goods, whether they are curious items, toys, paper, books, weapons, armor, or food. In food and drink cases they just rapidly get spoiled once mana leaves them. Including foods where you use dungeon-harvested ingredients for cooking even with regular ingredients."