The newly updated fact sheet for Legend of Zelda: Skyward Sword has revealed some new details about the upgrade system this game will have. It mentions that Link will find materials during his adventure that will be used to upgrade weapons, equipment and other items. But the key point is that it will also be possible to create new items from scratch with the items Link finds during his quest. Here’s a direct quote from Nintendo.
The Legend of Zelda Skyward Sword redefines the traditional Zelda framework and introduces an arsenal of items, upgrades and rewards unlike any game in the franchise to date. The adventure guides players into, out of and back to dungeons and areas they’ve already completed. Along the way, Link gathers a massive inventory of peculiar items and resources that can be used to upgrade many of his weapons and equipment.
A new weapon upgrade system allows players to gather raw materials from throughout Hyrule that can be used to upgrade weapons, equipment and items, or create entirely new ones from scratch.
It is unknown at this point what items exactly Link will be able to create and whether or not they can be a permanent inventory item or something that breaks down after time. Stay tuned as we gather more information on the subject.