After getting the magic powder, go to Smithy's Shop in Kakario Villiage in the Light World. Use the Magic Hammer on the stake and fall down the hole. Go up and throw Magic Powder into the red thing on hands. A bat will come out. When he's done, your Magic Bar will have a 1/2 on top of it. You now have double magic power!
When you get to the last boss, here's how to defeat him. Hit him a couple of times with your sword. He should throw his dagger at you. Try to avoid it. Do this another time. The third time you do this, he will twirl his dagger. Little fireballs will form around it. The balls will expand. Soon they will turn to fire bats. These bats take away 2 hearts. Try to avoid them. Keep hitting him with your sword. Do this step 3 times. When you finish, his dagger will be gone. Now his usual attack will be a power stomp that lets out a fire bat, that will make fire balls in its path. When he stomps, the floor will cave in on one side. If you drop through this, there will be 2 chests with treasures to help you. He'll stomp 4 times. Then the lights will go out. The 2 torches at the end of the room will go out. Light them with your torch or fire rod to see him. Hit him with your sword, then he will freeze. Quickly equip your bow and silver arrows. Shoot him once. The lights will go out again. Light them a second time to see him again, and hit him with your sword again. Equip your bow and shoot him with a silver arrow. Do this 1 or 2 more times and he will be defeated. A door will open and a bridge will appear. Go in the door to receive the tri-force. You have conquered the game!
Beside the desert in the light world, there is a man who sits by a sign and he says to leave him alone. When you are nearing the end of the game in the dark world, in the village in one of the demolished houses, there will be a chest. You can't open it, so bring it to that guy in the light world who wants to be left alone. He turns out to be a theif and he will pick the lock for you, and inside the chest is the last magic jar.
In the light world, when you are in the dark forest, you will see a rotted mushroom, you are allowed to put it in your item stash. It doesn't do anything, but take it and go to the witch who is brewing something beside the potion shop. Give the mushroom to her and she will say that she will give you something in return. So go in the shop, and beside the little guy sitting there, is a bag of magic powder.
Go to lake hylia near where the icerod was found lift the large grey stone
to find a passage inside are 20 rupees under pots go outside and come
back in. The rupees are there again.
Near the end of the game in the dark world, you will see in the pyramid
that there is a crack in it for a bomb to blow up. An ordinary bomb wo'nt
do the trick, but a super bomb will.
Go to the guy near the village selling bombs. He will have a big green one
to sell to you, go and buy it, but be carefull, since it is so big, you cant
carry it, you have to drag it to the pyramid.
When you get to the pyramid, releace the bomb in front of the crack. It
will blow a hole in the wall. Enter to meeet the fat fairy who will tell you to
throw items into the pond. The only items you can throw in are your
master sword, your arrows, and an empty magic jar. She will give you a
#4 sword, silver arrows, and fill your empty jars with magic potion.
Once you have the flute, if you play it in front of the weather vane in
Kakariko, the duck will come and help you. He can transport you to many
locations. Here they are:
#1 Death Mountain
#2 Witch's Hut
#3 Kakariko Village
#4 Link's Cottage
#5 Warp Tile South of Eastern Palace
#6 Warp Tile in Desert
#7 Swamp Ruins
#8 South of Lake Hylia