Ha Ha. I mean that like since Majora's Mask and the Fierce Dinesty mask are most likely from the same place, that they are both evil, but since link was waring it using it for good, it couldn't be used for evil.

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A sword wields no strength unless the hand that holds it has courage. You must use your courage to seek power...and find it you must. Only then will you become the hero for whom this world despairs.