The Legend of Zelda: Ocarina of Time Glitches

Underwater sword
To get the Kokiri, Master, Biggorons, and giant's knife swords under water go to lake Hylia and put on the Zora tunic and Iron boots. Stand in the water so you are not swimming, but in the water. Now charge up your sword with or without magic slowly walk in the lake and you should be holding it out.