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Trader Link

1. Pocket Egg Talk to the girl who raises Cuccos in Kakariko Village and agree to take care of her egg. When the egg hatches use the bird to wake up Talon. Return to Kakariko Village and return the newly hatched bird. In return, she will give you Cojiro, a Cucco that once belonged to her brother.

2.Cojiro Enter the Lost woods to find the young girl's brother near an old stump, slumped over in exhaustion. When he sees Cojiro, he'll ask you to deliver an odd mushroom to his grandmother back in Kakariko Village.

3.Odd Mushroom You'll have a limited amount of time to take the Odd Mushroom to the woman in the hidden potion shop in Kakariko Village before the fungus spoils. If you deliver in time she'll give you an Odd Potion to take back to her grandson.

4.Odd Potion Return to the Lost woods where the grandson was- you'll find a Kokiri girl where the boy once was. She'll insist that you hand over the potion, and in return she'll give you the Poacher's Saw.

5.Poacher's Saw Take the Poacher's Saw to the carpenter near the tent in Gerudo Valley. He'll be surprised to see the saw since he left it with his wife. all he has to offer in return is a Broken Goron's Sword.

6.Broken Goron's Sword Climb to the very top of Death Mountain to see the giant Goron, Biggoron. The skilled craftsman says that he would be happy to repair the broken sword, but before he can do any work he needs the Eye Drops from King Zora. He gives you the prescription to take to King Zora. 

7.Prescription King Zora tells you that he doesn't have any Eye Drops on hand. Instead he offers the Eyeball Frog, a main ingredient in the drops. He suggests that you take the perishable frog to the professor who lives beside Lake Hylia.

8.Eyeball Frog You'll have three minutes to get the Eyeball Frog to the professor. Use the shortcut through the Lost Woods to shorten the trip to Lake Hylia, and use Epona to travel the distance across Hyrule Field.

9.Eye Drops Rush back up the Death Mountain Trail before the Eye Drops spoil and give them to Biggoron. You've got four minutes to complete the task- ride Epona the whole way across Hyrule Field. Hitch a ride on the Magic Bean plant to the upper trail; Biggoron will give you a Claim Check for his sword. He'll tell you to come back in a few days to pick it up.

10.Claim Check When three days pass give the Claim Check back to Biggoron to finally pick up Biggoron's  Sword.

11.Biggoron's Sword Biggoron's Sword is larger and more powerful than even the legendary Master Sword-twice as powerful! You'll need both hands to wield it, which means that you can't use the sword and shield at the same time.