Orichalcum

Orichalcum is an item found in Kingdom Hearts and Kingdom Hearts II that is used in Item Synthesis. Unlike many other Synthesis materials, Orichalcums are never dropped from Heartless, save one type, and are only be found in chests or won through quests. The only Heartless that drop them are the Behemoth in Kingdom Hearts and the rare Bulky Vendor in Kingdom Hearts II, and certain conditions must be met with the latter for the drop to happen.

Named for a legendary material, Orichalcum are used in making some of the most powerful and valuable items. In the first game, they are key ingrediants to synthesizing the Three Stars, Power Ups, and the Atlas Armlet. In the second game, items that use Orichalcum include the Petit Ribbon, Ribbon, Moon Amulet and Star Charm. Most importantly, they are used in the creation of Goofy and Donald's most powerful weapons, Save the King and Save the Queen, as well as the powered-up + versions of each.

An even rarer version of Orichalcum exists in the second game. Called Orichalcum+, it is a key ingredient in synthesizing Sora's most powerful Keyblade, Ultima Weapon along with regular Orichalcum.