The two-handed Biggoron’s Sword deals substantially more damage than the Master Sword at the cost of slower swings and the inability to use a shield, and it appears in both the original N64 release and the 2011 Nintendo 3DS remake by Grezzo and Nintendo.
The trading quest begins in Kakariko Village and requires a chain of exchanges that sends Link across Hyrule.
Notable mechanics to remember: several items in the chain are time-limited, and several steps require traversal between Kakariko, the Lost Woods, Gerudo Valley, Death Mountain, Zora’s Domain, and Lake Hylia.
Summary of the trading chain (high level): start with the Pocket Cucco in Kakariko Village, trade it for Cojiro, then exchange Cojiro in the Lost Woods for an Odd Mushroom.
The Odd Mushroom must be taken immediately to Kakariko’s potion shop to receive the Odd Poultice, which is returned to the Lost Woods for the Poacher’s Saw.
The Poacher’s Saw becomes a Broken Goron Sword in Gerudo Valley.
Present the Broken Goron Sword to Biggoron on Death Mountain to receive a prescription for eye drops; King Zora provides an Eyeball Frog in Zora’s Domain, which you must deliver to Lake Hylia to receive Eye Drops.
Returning the Eye Drops to Death Mountain yields the Biggoron’s Sword receipt, and after three in-game days Biggoron finishes the blade.
Several time windows are critical: the Odd Mushroom spoils quickly, and the Eyeball Frog also has a short spoil timer — plan routes and use Epona when available.
The Sun’s Song can accelerate time for multi-day waits; playing it six times advances the three in-game days needed for Biggoron to complete the sword.
When you first meet Biggoron, he explains he cannot finish the weapon because volcanic ash has injured his eyes and provides a prescription for eye drops to be filled at Zora’s Domain.
That exchange is essential to progressing the quest.
This trading sequence is a long-standing staple of Ocarina of Time design and rewards players with one of the game’s most powerful melee weapons.
For players on the 3DS remake or the original N64 version, the steps and time constraints remain fundamentally the same, making this a quintessential Ocarina side quest for fans and speedrunners alike.