The Razor Sword is the 2nd sword you can obtain in The Legend of Zelda: Majora's Mask. Even though it looks a little ugly, I wouldn't mind the cosmetic inferiority if the sword was more than useless.
While it was a tad stronger than the starter-weapon, the Kokiri sword it had one huge disadvantage. That was after 100 strikes, it would revert back to the Kokiri sword. Making it a huge waste of rupees. It is by far the worst sword in Zelda history.