People, other heroes and even Naofumi did not seen a Shield as a weapon and considered it useless. He was condemned to be a failure and the other heroes thought that Naofumi would never be able to achieve a higher level. Due to a non-existent attack power, Naofuni began to feed his shield with a variety of ingredients from organic and inorganic, books, to the some of the tools which was used a for compounding and crafting. He continued to unseal various shields which at first glance have no use in batle, but Naofumi fights using tactics and realized after he unseal several shields with equipment bonus, special effect and true power unsealing, that the weak shield can be helpful if you unseal it. With the true power unsealing, the user receives permanent stats and abilities. After exchange between heroes on their respective strengthening methods, Naofumi has become even stronger