Zelda Ocarina Of Time Master Quest : Biggoron's Sword

The quest for Biggoron's Sword begins with a simple act. The Cucco Lady gives you a Pocket Egg. This egg belongs to a new species of Cucco that she is no longer allergic to. These Cuccos are said to have a melodious song and love to wake up heavy sleepers. It's time for a series of trades and small missions.

To get the Pocket Cucco, you just need to wait one day; the Cucco will hatch from the egg at sunrise. Since the third trade also takes place in Kakariko Village, I advise you to play the Sun's Song until the egg hatches.

To get Cojiro, you first need to wake up Talon, who is sleeping in the house opposite the village entrance. Then, go back to the Cucco Lady to get the blue chicken. This little chicken hasn't crowed in a very long time.

To get the Odd Mushroom, take Cojiro to the master craftsman's son, located to the left of the entrance to the Lost Woods (where Skull Kid used to play music when you were a child). Guessing that you are - like him - a cool guy, he asks you to take the mushroom to the potion shop in Kakariko.

To get the Odd Potion, you must reach the potion shop within 3 minutes of obtaining the mushroom. This shop is located behind the regular potion shop. It must be daytime (use the Sun's Song if necessary), and you have to go through the first shop's back door and take the stairs.

To get the Poacher's Saw, return to the spot in the Lost Woods. The guy has disappeared, and a Kokiri girl quotes a proverb saying that any Hylian who gets lost in the forest becomes a Stalfos. He is now a monster, and only his saw remains. Give the potion to the girl to retrieve the saw.

To get the Broken Goron's Sword, head to Gerudo Valley with Epona. Jump over the gap of the broken bridge while galloping. Then, dismount and give the saw to the master craftsman.

To get the Prescription, climb to the very top of Death Mountain (just in front of the crater) and give the broken sword to Biggoron, who is rubbing his eyes.

To get the Eyeball Frog, first go to Zora's Domain (play Zelda's Lullaby to stop the waterfall). If you don't have Blue Fire (available for 300 Rupees at the shop), go to Zora's Fountain (behind the King) and jump across the icebergs to reach the Ice Cavern. Go through it to get a Blue Fire and return to King Zora. Use your Blue Fire on him to melt the ice block trapping him and give him the prescription.

To get the Eye Drops, you must quickly reach the Lake Hylia Laboratory and give the frog to the scientist.

To get the Claim Check, you must quickly return to the top of the mountain and give the drops to Biggoron.

Play the Sun's Song about 7 or 8 times and go show the Claim Check to Biggoron. He will then give you the unbreakable Biggoron's Sword, which you must hold with both hands.