After getting Frog's Song of Soul from the Signpost Maze, the Flying Rooster helps you get the key to Eagle's Tower in the Tal Tal Mountains.
Get a Key
Go east from the entrance. Jump over the spikes and go east to the next room. Kill the two Like-Likes. A key will fall from above.
Get the Mirror Shield
Use the key to unlock the nearby door and go through. Go up the stairs.
Go north to the next room. Use the Power Bracelet to pick up the ball and take it to the room to the south. Drop it somewhere near the stairs. Then go north again Use the Power Bracelet to pull the lever down, then use the Pegasus Boots to dash to the west exit before the blocks close. Go through the west exit.
Fall into the hole on the right side of the room. Be careful of the Like-Likes and Stalfos, and use the east exit. Use the hookshot to hit the crystal switch, then go west, and from there go south, then go east. Get past the Traps, then go south. Go through the northeast door and then go north and up the stairs. Go to the chest and open it to get the Mirror Shield.
Get a Key
Fall into the hole in the room where you got the Mirror Shield. Go north until you find a chest. It contains a key.
Get the Map
Jump down from the ledge. You can use the Mirror Shield to block the beams that the Beamos shoot at you. Go west, then go up the stairs. In this room, throw the chess pieces until they are both standing up. A chest will appear. It contains the map.
Get the Compass
Go south. Go to the block in the southwest part of the room and push it down, then go west through the passage that you opened. In the next room, jump over the spikes and go north. Hit the Three-of-a-Kinds so that their symbols are all the same. A chest appears. Open it to get the Compass.
Get a Second Key
Go down the stairs in the room where you got the Compass. Use the northwest exit, and follow the path (using Bombs on the Anti-Kirby) until you find stairs. Go up the stairs.
Go south to the next room. There is a Hinox here. Don't let Hinox catch you. Hit it with your sword until it dies. If you fall, just go north and go up the stairs, then go south to return to the Hinox room.
When the Hinox dies, a key appears. Take it.
Get a Secret Seashell
Jump into one of the holes along the west or south wall. You should land on the ledge in the area below. Walk north along the ledge until you find a chest. Open it to get a Secret Seashell.
Throw the Ball at a Pillar
Jump down from the ledge and go all the way south, then go all the way east. Go through the northeast door, then go north and up the stairs.
If you ever drop the metal ball into a hole, it will reappear in the room where you first found it.
If the metal ball is not in this room, and if you can go north, go north and use the Power Bracelet pick up the metal ball and go south with it, and drop it near the stairs.
If the metal ball is not in this room, and if you CAN'T go north, stand on the lowered blocks and use the hookshot to hit the crystal switch, then go north and get the metal ball, bring it south and drop it near the stairs.
If the blocks in the middle of this room are raised, go north, pull the lever so you can go west, then fall into the hole on the right side of the room. Go east and use the hookshot to hit the crystal switch, then go west, south, east, south, and then use the northeast exit. Go north and then up the stairs.
If the metal ball is in this room and the blocks in the middle are lowered, take the ball and go south with it. Drop the ball and unlock the key block, then take the ball and go up the stairs onto the ledge. Go north, then west, then jump off the left side of the ledge. Throw the ball at the pillar. It will collapse.
Throw the Ball at the Second Pillar
Pick up the ball and go north. Drop the ball, then kill all the hidden Zols in this room. If you don't, you will probably drop the ball into a hole in this room and have to go get it in the room where it first appeared. After you kill all the Zols in this room, throw the ball at the pillar in this room to make it collapse.
Throw the Ball at the Third Pillar
There is a block in the southwest part of this room. Push it down, then pick up the ball and go west with it. Then go north, throw the ball over the spikes, then jump over the spikes and pick up the ball. Take it north, then use the southwest exit. Throw the ball over the barrier. Then go north and go down the stairs.
Use the northwest exit, then follow the path, using bombs to get rid of the Anti-Kirby in the way. Keep following the path until you reach the stairs. Go up.
Go through the one-way door in the north wall. Go to the southeast corner of the room and raise your shield to protect yourself from the flying tiles. Be careful not to fall into the holes that they leave behind, because you will fall to the lower floor. If that happens, go south, then go up the stairs, then go through the one-way door again. After all the tiles are gone, go through the east door.
Throw the ball at the pillar to make it collapse.
Throw the Ball at the Fourth Pillar
Go to the southeast part of the room and push the block into the hole. Throw the ball over that hole, then jump over the hole. Pick up the ball and go east with it.
Drop the ball, then push the block to the right. Pick up the ball and go south, then go south again. Throw the ball over the barrier. Then go north to the previous room.
Fall down a hole on the right side of the room, then go east. Go past the Traps and Gibdo, then go south. Use the northeast exit, then go north and up the stairs.
Go south, then go up the stairs in the next room. Go west, then jump off the ledge. Pick up the ball, then go west with it.
Throw the ball north over the barriers. Then kill the Three-of-a-Kinds by making their symbols match. This causes a chest to appear in this room.
Then go west, then north, then go north through the one-way door. Wait again for the tiles to stop flying, then go through the east door.
Put a bomb between the two torches in the south wall. Go through the hole that appears. In the next room, go to the south wall and use a bomb there. Go through that hole.
Use the hookshot on the chest on the right side of the room. Open it to get bombs.
Go around the barrier and pick up the ball, then go north. Throw the ball at the pillar to make it collapse.
Reach the Mini-Boss
Go south and fall into the hole. You will end up in the entrance room of the dungeon. Go as far east as you can go, then go through the northeast exit. Go north and go up the stairs.
Go south and stand on the lowered blocks, then use the hookshot on the crystal switch to raise the blocks while standing on them. Then go south, then west. Go up the stairs to the third floor.
Go north, then east.
Mini-Boss: Grim Creeper
Grim Creeper uses a flute to summon six Big Keese. You have to kill all six before they fly off of the screen. Otherwise, all six will reappear afterward and you have to try again. After you have killed all six, a warp spot appears, and Grim Creeper runs away.
Get the Nightmare's Key
Go north. Push the two blocks toward the middle of the room, being careful to avoid the Spark spinning around one of the blocks. A chest appears. Open it to get the Nightmare's Key.
Reach the Nightmare
Hit the crystal switch before you leave the room where you got the Nightmare's Key. Then go south from the room where you got the Nightmare's Key, then go west until you see the Nightmare's Door. Open it and go through.
If you don't have a Secret Medicine, you can optionally get one. But if you already have one, don't get the second one, because you can only hold one at a time, so the second Secret Medicine would disappear.
To get the Secret Medicine, go north from here, then east and throw the two chess pieces to make them both stand up. However, there is a Beamos in the room that makes it very difficult to throw the chess pieces without getting hurt, so it might be best to avoid this.
In the room that you reached after going through the Nightmare's Door, go up the stairs in the corner of the room and use the hookshot to go across to the other side. Go south from there, then go up the stairs, then go up the ladder.
Evil Eagle swoops toward you. You can hit its beak with the hookshot, the boomerang, arrows, or the magic rod. With the magic rod, the eagle will be defeated in three shots. With arrows, it will be defeated in six shots. With other weapons, it takes eight hits. If you don't hit the eagle before it flies through you, you can raise your shield to protect yourself.
Stay near the center of the tower at all times. If the eagle comes down diagonally from above and stays at the side of the tower, run toward it and raise your shield, then start running toward the eagle. The eagle will make the wind blow, while also shooting sharp feathers at you. With your shield raised, you will be safe from the feathers, and if you start running toward the eagle while as close to the eagle as possible, you shouldn't get knocked off the tower. If you do get knocked off, you have to climb up and start the battle from the beginning.
Sometimes the eagle comes straight down from above. This means that it is going to attack with its claws rather than blowing wind at you. Try to hit the eagle's beak when it does this. Otherwise, raise your shield to protect yourself from that attack. Repeat the strategy to defeat Evil Eagle and get a Heart Container.
Get the Musical Instrument
Go back down the ladder and go to the door. Press up to go inside. Jump down the east ledge and go through the door, then go up and take the Organ of Evening Calm.
The next hint tells you to use the music of the Ocarina.
Find the Next Dungeon
Outside Eagle's Tower, jump off the right side of the ledge, then go east and into the cave. Follow the path. Eventually you reach some water. Go up the stairs in this screen, then go west until you see a house. Go west from the house, then use the hookshot to cross the bridge.
You find Marin stuck on the bridge! Use the hookshot on the rock on the left side of the bridge and you will catch Marin as you go past. After a cut scene, the Owl will tell you to go west and use an Ocarina song to open the next dungeon.
Go west and cut the bush, then go down the stairs. Go west and jump into the pit, and go down the stairs there. Use the hookshot to go across the gap in the next screen, then go outside.
Go west while avoiding the rocks, then go up the stairs and go east. Go up the stairs that you find there. From there, go west, and open the chest to get 50 rupees. You can lift the rock near that chest to find some stairs. Go down and use Magic Powder in the well. The Mad Batter will allow you to carry more bombs or arrows (depending on whether you have encountered the Mad Batter before).
When you're done, go back upstairs and go west. Here at Spectacle Rock, your path is blocked, so just jump off of the ledge. There is a cracked wall in the middle of the north wall, so bomb it and go through.
Go north, then equip your Mirror Shield and raise it, then walk north into the flames. The shield will deflect the flames so you can go north. At the top, go to the left and go up the stairs.
You emerge from Spectacle Rock. Go west, and follow the path. You will find a phone booth where you can talk to Ulrira if you wish. Go west from there and you find Turtle Rock. Play Frog's Song of Soul on the Ocarina to wake up the turtle. It will attack. It moves side to side, then it pauses, then it quickly moves toward you. Run away when it stops moving. Hit it with your sword whenever you get a chance. Eventually, it dies. After that, you can go into the eighth dungeon, Turtle Rock.