Bring a broom.
Christine's letter must be sent to Mr. White on the outskirts of the mysterious forest. Put Mr. White in the upper left corner of the forest, just below the mountain, then give him a letter (and a photo of Princess Peach) in exchange for a broom, and then take the newly acquired animals back to the animal village for a quick trip.
Take a fishhook
When you open the broom, you can find Grandma Yulila. She can sit in front of the house in Mabei village or have sex in the animal village. It is impossible to know her exact location, and we need to explore it. Give grandma a broom and she will give you a hook. Please note that the fourth dungeon is absolutely necessary to continue the trading task.
Buy a necklace
According to grandma Urrila's position in the previous step, go back to the animal village and find the ladder leading to the west water source. Swim south, find a fisherman, and then turn him into a mermaid's necklace with a fishhook.
Get shells
Stay where you are, swim to the northwest of the river and find a mermaid in the water. This newly acquired necklace belongs to a mermaid, so I am grateful to return it to her. She will reward a mermaid shell from her tail.
Reward 1: magnifying glass
Once you get the mermaid scale, all the transactions need to be completed. Now it's time to collect some rewards. The first thing is a magnifying glass, which can be used to find invisible objects all over the world. In order to get a magnifying glass, players need to complete the fifth dungeon and get a hook. Swim to the right wall of the fifth dungeon in Martha's Bay, and then return to the place where Link jumped off the bridge.
This time, use Hookshot to jump out of the small gap, and then position it up along the wall to find the mermaid statue. Insert the mermaid's scales into the statue, and the statue will move backwards, revealing the hidden stairs below. There is a single box with a magnifying glass, and of course it is guarded by boss.
Bonus 2: Darts
Go back to Torombo Beach and find a cracked wall under the sales office. Destroy the wall with a bomb, then enter the cave and find Moblin, who was once invisible. In exchange for one of Link's valuables, Link can get a boomerang, a weapon that can be used to stun most enemies.
Once you get a magnifying glass and darts at the same time, you will return to Mabei village and enter the small library. Players can now read aloud the book of darkness in the lower right corner with a magnifying glass. This book outlines how to reach the ultimate leader of Link's awakening through the maze under the dome. Note: The arrow of each playback arrow is random, so it is best to take a screenshot for later use, but don't expect the next playback arrow to use the same pattern.