Talk:Four Sword
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It seems that the Minish Cap Four Sword might be the original Master Sword, as it's pre-broken form looked like the blue Master Sword, and early boxart seemed to show it as a golden Master Sword. http://www.kasuto.net/image/minish_cap/minishcap.jpg
The Minish Cap Sword is also missing the eye of Vaati, and instead has a jewel. This might explain why it functions differently - it was cursed by absorbing Vaati, and the blade of evil's bane (remember, TMC Four Sword had evil-bane power that was not seen in later FS games) part would have seperated, as it could not be combined with evil. http://images.amazon.com/images/P/B00030GS80.01._PE12_.The-Legend-of-Zelda-Minish-Cap._SCLZZZZZZZ_.jpg