The Biggoron Sword quest is an optional, lengthy side-quest in Zelda: Ocarina of Time.

Known as Biggoron's Sword in the N64 original, keen-eyed players may have noticed there's an additional sword slot in your inventory. Despite being the sword of legend, the Master Sword isn't the most powerful armament you can procure: that title belongs to a big Goron Sword crafted by Biggoron.

It involves a lengthy trading sequence involving various residents of Hyrule to unlock, and this Biggoron Sword guide can help on every step of the way.

When can you start the Biggoron Sword quest?

Due to the steps required and the powerful reward on offer, long-time Zelda: Ocarina of Time players will likely want to start the Biggoron Sword quest as soon as possible.

Though you can start it as soon as you become Adult Link, practically you can only finish it once you have explored the Ice Cavern and thawed King Zora in Zora Domain.

While you are free to make a start until then, but it's only when you have encountered this mini-dungeon (which you need to do in order to access the Water Temple) that the sequence can be completed in full.

That said, though not technically required, having both Epona and completed the Water Temple will make some of the timed elements much easier, and unlocking songs to teleport to the Forest Temple and Fire Temple will save you some time throughout.

With that out of the way, let's get started.

Pocket Cucco (From a Pocket Egg Comes...)

Speak to the Cucco Lady in Kakariko Village to hear about a "very rare cucco egg". Similar to the one you received from Malon in Hyrule Castle as Child Link, you'll get an egg which hatches a Pocket Cucco automatically after a set amount of time.

To speed up the process, play Sun's Song until it's dawn so the egg can hatch quicker. First step done - and the next stage is in the very same village.

How to wake up rancher Talon

As the Cucco Lady hints at, the Pocket Cucco can wake up the heaviest of sleepers. Head to the house in the centre of Kakariko Village (it's on the ground level; see the screenshot below for the exact location) to find the rancher Talon sleeping in a bed on the right.

Present the Pocket Cucco to wake Talon up, who will return to Lon Lon Ranch. Now head back to the Cucco Lady and you'll trade your pocket Cucco for a blue Cucco named Cojiro.

Cojiro

Cojiro belongs to the Cucco Lady's big brother, who can be found in the Lost Woods, specifically by going forward as soon as you enter the maze.

The easiest way to get there is by playing Minuet of the Forest (unlocked by visiting the Forest Temple) to reach the Sacred Grove, entering the Lost Woods maze and purposely choosing a wrong exit (by going right, for example) to restart the maze from the Kokiri Forest entrance, then going forward in the maze as soon as you enter.

Approach the sleeping man and present Cojiro, waking him. This is the Master Craftsman's Son, who will now hand you the Odd Mushroom, which you have to take to Kakariko Village ASAP.

Odd Mushroom

Go to the Potion Shop in Kakariko Village, and give Granny the Odd Mushroom. The catch? You only have four minutes to do so.

The good news is provided you have unlocked Epona, you'll get there with time to spare. Simply exit the Lost Woods maze and Kokiri Forest to Hyrule Field, then call Epona using Epona's Song, and ride to the village at the top of the map.

The Potion Shop is the north-west most building in Kakariko Village, with its entrance facing west. To reach it, enter the north-most building - a shop with a purple door - run through the shop, then take the back door as a shortcut.

Now go up the stairs, enter the Potion Shop, and present the Odd Mushroom. You'll get the Odd Poultice in return.

Odd Poultice

Return to the Lost Woods to where the Master Craftsman's Son was (enter the maze from the Kokiri Forest entrance, then go forward) to find Fado waiting for you.

Present the Odd Poultice to Fado to receive the Poacher's Saw.

Poacher's Saw

You get little direction for this, but you can piece it together by progressing the story; the Master Craftsman's Son must have left this behind, so perhaps visiting his dad - the Master Craftsman himself - is your objective?

Head to Gerudo Valley to find the Master Craftsman in the tent on the right beyond the bridge. (You'll either need Epona, the Longshot from the Water Temple, or have completed the Gerudo's Fortress section to rescue all four carpenters so you can cross the bridge.)

The Master Craftsman will then give you the Broken Goron Sword.

Broken Goron Sword

You'll be told that Biggoron, who lives at the top of Death Mountain, can fix the broken sword for you.

The fastest way to get there is to play Balero of Fire - the song you learn from visiting the Fire Temple - to teleport to the Death Mountain Crater. Next, take the south-most exit, where Biggoron will be directly on the left.

Show the Broken Goron Sword to Biggoron. Before he can get to work repairing the sword, he needs some eye drops; you'll be given a Prescription for an order.

Prescription

Take the Prescription to King Zora in Zora Domain. If you haven't already, you need to explore the Ice Cavern (which is found in Zora Fountain, which is just behind the throne room), where you must capture some Blue Fire in a Bottle, then use it on King Zora to thaw him out.

Show King Zora the Prescription, and you'll learn he doesn't have any - but if you take the Eyeball Frog to the scientist at Lake Hylia's Lakeside Laboratory, he can help instead. Be warned - a time-sensitive delivery is next!

Eyeball Frog

You have two and a half minutes to take the Eyeball Frog to the scientist at Lake Hylia's Lakeside Laboratory.

Though you can probably make it in time using Epona, it's recommended you use the Lake Hylia shortcut in Zora Domain. This only appears when you have completed the Water Temple, which thaws out Zora Domain so you can dive into the water opposite the waterfall to find an underwater tunnel.

However you get there, the Lakeside Laboratory is found on the north side of Lake Hylia. Approach the scientist to receive another time-sensitive item - the Speciality Eye Drops.

Speciality Eye Drops

You have three and a half minutes to take the Speciality Eye Drops to Biggoron at the top of Death Mountain.

The quickest way is taking Epona to Hyrule Field, then Kakariko Village, followed by Death Mountain Trail. From here, take the Death Mountain Crater shortcut in Goron City (found at the back of the throne room, which you'll unlock by accessing the Fire Temple) then take the south-most exit to find Biggoron; we had about a minute on the clock remaining doing this route, so you should have some time to spare.

Present the Speciality Eye Drops, and good news - the trading sequence is more or less complete! With the Biggoron Sword Receipt in hand, it's now a case of waiting.

Biggoron Sword Receipt

When you have the Biggoron Sword Receipt, you must wait three days for repairs on the sword to be completed. To speed things along, use Sun's Song until three days pass (that's six uses). If you're not sure, check in with Biggoron and he'll let you know if you need to wait a little longer.

When ready, the Biggoron Sword is finally yours! This massive sword requires two hands to wield (that means you cannot use a shield at the same time) but it also deals double damage compared to the Master Sword - a worthwhile tradeoff, we'd say.

Well done on the weapon! If you're looking for other powerful Adult Link upgrades, then make sure you visit all the Great Fairy Fountain locations to increase your defence, magic and receive useful spells.

Looking for more help with Zelda: Ocarina of Time? See our walkthrough hub for where to go next (from the Lost Woods to Hyrule Castle) and a compendium of all our guides - which includes Heart Pieces, Gold Skulltulas, Bottles and Great Fairy Fountain locations, how to get Horse Epona, what amiibo unlocks do, and the Hall of Fallen Foes location.