The Master Sword's design has changed in each game it has appeared in. In ALttP (according to the official artwork), it was silver. In OoT, the Master Sword had the same basic design, but it was now indigo. In Wind Waker, the design slightly changed at the bottom of the handle. Now it TP, it is longer and has those two spikey things on it. Personally, I think the Master Sword in TP looks the best, it actually looks like it can repel evil unlike those other wimpy looking Master Swords from the past games.

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