You need the dragon scale which you can obtain by completing the first silent realm challenge.
You have to get the Water Dragon Scale by completing Farores Trial in Faron woods
Water dragon scale while looking for the flame in Faron forest
In "The Legend of Zelda: Skyward Sword," the second item in the purple box is the "Goddess Cube." These cubes are scattered throughout the game world, and activating them unlocks treasure chests in the sky, rewarding players with various items and upgrades as they progress through the game.
The little clumps of dirt with an X on them can be dug into using claws; you'll get that item as the story progresses.
You must sneak around without being heard or spotted. there are several chests that each include an item from your adventure pouch that will help you reach the next chest. Your sword is located in the "HOT" area inside the volcano.
You learn to swim later in the game when you receive a Water Dragon Scale. You must pass the trial in the Faron Woods to obtain the item.
Unfortunately, you can't pull levers or do anything while swimming, so you'll have to either get on land, or climb on a lilypad. If you can't reach the lever, try using the dungeon item...
A long sword is a sword that was primary used in western Europe it was used for sword and board type if item
well water
Sword
His sword, Excalibur.
one symbolic item is Jason Grace's gold coin/sword.