Negotiations with the Underworld
For this part, you will need the following items: 5 magic beans, a blue potion, a fish, milk, 10 Deku nuts, and a ghost in a bottle. Blue potions can be bought from the deku trader found on the Ikana road. Milk can be bought at the ranch on Milk Road (not the Romani ranch). A ghost in a bottle can be caught on day 3 in the graveyard, but that might be a little late. Another ghost can be caught somewhere during this quest, so have a spare empty bottle. A fish can be caught in any place that has shallow water and little fish floating around in it (no, they aren't just there for the background).

Go up the path to Ikana (past the graveyard, the place where you did the last Deku trade). Head over to the stream when you get there, and freeze the 2 octopus monsters with ice arrows to get across. Hookshot from that platform over to another, then to another across the way, then to the top of the mountain. Hit the owl statue here with your sword so you will beable to come back whenever you want.

Work your way up the hill, walking up the dried up river bed. Try to run past the mummies before they freeze you. When you go in the cave at the top, a ghost will appear and cause you to be damaged every second. Play the song of Storms, which will clear out the poison, destroy all the mummies, and make the river flow again.

Go back out and run down to the house with the horn sticking out of it's roof. The girl sitting outside should run inside and lock the door. Climb up the ramp a little bit away and wait for her to leave. Run inside when she is far away enough, and open the closet in the basement. When the mummy comes out, play the song of healing, and you will get the Gibudo Mask after it falls off the man's face. He will be reunited with his daughter.

Wear the mask, and go up the ramps by the musical house. Look for a huge hole in the ground, and when you find it, hop down. The first mummy on the right in this area wants the 5 magic beans. give them to him, and go through the door. Find the mummy in the next room who wants 10 Deku nuts. Give them to him, and proceed on. In the next room, one mummy wants 10 bombs. If you don't have the ghost, you can get one by fighting a Poe in the room after the 10 bomb guy. It will take 5 arrows to kill the Poe. Get the Poe and go back to the Deku Nut mummy. Give the other one in that room a big poe to pass. The next mummy will want fish, followed by one who wants the bugs in a bottle, and finally one who wants the milk. After that, you will be in a room with 4 torches. Light them all with fire arrows and a chest containing the Mirror Shield will appear. Don't leave yet, unless you need to get a big bomb. Continued in the next chapter.