How to get Silver Arrows (Required) and Sword Level 4 (Optional):
After getting Crystals 1-6 by beating Dark World Levels 1-6 go to the Dark World Bomb Shop, which is Link's House in the Light World. In there buy the orange bomb for 100 ruppies, and head east then north past the Dark World Level 1 Ruins to the Pyramid of Power that you witnessed when you first entered the Dark World. Don't hit R ever until you reach the second landing of the Pyramid of Power. At the dark brown cracked slab have link walk right next to the cracks so that the bomb is sitting directly on the cracks. Hit R, and run a few feet away. Inside is a fairy in a pond. When it asks to throw something in, throw the Master Sword in for a Level 4 Upgrade, and the Bow and Arrow for the Silver Arrow Upgrade.
-End of Part XV-