Use the following long trading sequence as an adult to get Biggoron's Sword. Go to the lady that gave young Link the empty bottle, when her Cuccos were rescued. She will give Link a Pocket Cucco egg. Wait for the egg to hatch, then bring it to Talon in Kakariko Village. Bring the Cucco back to the lady, to receive Cojiro, the Blue Cucco. Go to the Lost Woods, then turn right at the entrance. Give Cojiro to the man to receive an Odd Mushroom, which will spoil if too much time is wasted. Rush to the Potion shop in Kakariko Village, then go left into the room. Run into the shop to the right, then give the Mushroom to the lady at that location. She will give Link an Odd Potion. Hurry back to the Lost Woods. The man will be gone, but a Kokiri will be here. Give the Potion to her to receive the Poacher's Saw. Ride the horse to Gerudo Valley. There is a broken bridge here, so whip Epona to jump it. Give the saw to the carpenter that is outside to receive Biggoron's Broken Sword. Go to the top of Death Mountain, then walk to the right. Biggoron will appear, rubbing his eyes. He has an eye infection and will give link a Prescription. Bring the Prescription to King Zora after he has been unfrozen to receive the Eyeball frog, an ingredient for the Eyedrops. Hurry to the Lakeside Laboratory at Lake Hylia and give the Eyeball Frog to the Old Man. He will give Link the Eyedrops. Hurry back up to the Death Mountain Summit and ive the Eyedrops to Biggoron. After using them, he will give Link a Claim Check. Wait three days (play the Sun's Song six times to quickly pass the time), give him back the Claim Check to receive Biggoron's Sword. This weapon is twice as powerful as the Master Sword, and will not break like the Giant's Knife. Note: If Link is late during any of the time-sensitive parts of the trade, the game will restart back at the person you need to give the item to, and will cost you ten rupees, but will allow another try. Ocarina songs may not be used to teleport to a location during the trade.