In the enclosed Swamp of Evil in the Dark World, you must reveal the hidden entrance to Misery Mire.

Get a Key

Follow the path, but beware of the hidden Zols that come up from the floor as you go past. Use the Hookshot on the block on the other side of the hole to go across. Go down the stairs.

Kill the two Popos, then go north. Wizzrobes will appear and disappear in this room, shooting a beam in the direction that they are facing before they disappear. Your shield can't block this beam. Carefully kill all of the enemies in this room while dodging the beam from the Beamos. After all of the enemies are gone, the north door will open. Go through it.

Go down the stairs to the lower area, then go northwest. Don't go up the northwest stairs. Instead, go east through either of the two passageways to the right of the northwest stairs. You will find stairs at the end. Go up, then go north through the door at the top.

The two lamps will shoot orbs at you. Dodge the orbs and push the block to the left or right, then go north through the door that opened. Keep going north until you reach a chest at the end of a wooden bridge. Open it to get a key.

Get a Second and Third Key

Go south until you are back in the room with the two Popos and the lamps that shoot orbs. Push the block down, then go through the east door.

Pick up the northwest skull to get a key. Use the Magic Cape to walk across the spikes and pick up the skull there, then step on the switch, revealing a chest. Open it to get another key. Go through the locked door in the north wall. You arrive in a room with a net on the east side. Go through the north door.

Get a Fourth Key

Continue along the straightforward path and you will eventually reach a room where a Wizzrobe appears right in front of you, so move out of the way to avoid its beam. Two Medusa statues to the south of the door will be spitting orbs at you. Go northwest and enter the south part of the passageway, making sure to avoid the Spark that goes around the wall. At the end, hit the crystal switch to turn it blue. Pick up the nearby skull to get a key.

Get the Map

Go east through the northern half of the passageway, then go back through the door in the east wall. Follow the path until you are back in the room with pink Stalfos, a Beamos, and spikes in the floor. Go through the door in the south wall.

Avoid the orbs that the Medusa statue spits at you, then open the chest to get the map. Go through the locked door in the west wall.

Get a Fifth Key

Go down the nearby stairs, then go to the northwest corner of the room and go up the stairs there. Go to the southwest corner of the room, then walk north on the net while dodging the orbs from the Medusa statue and pick up the skull to reveal a switch. Step on it and open the chest that appears, to get another key. Go back to the southwest corner of the room and go through the locked door there.

Get a Sixth Key

Make sure that the crystal switch is blue. The yellow object in this room is called a Yomo Medusa, and it will spit a fireball in your direction whenever you swing your sword, so be careful not to be in its path. Use Magic Powder on the Bubble if you wish. Kill or avoid the floating Stalfos skulls. Kill the blue Bari to get a key. Go through the locked door in the west wall.

Get the Compass

The tiles in the floor will float up and fly toward you. You need to light the four torches in this room, and you can either try to do so while the tiles are still flying, or you can just hide in the doorframe until the tiles are gone—but to stay safe from all of the tiles, you will need to walk slightly east while staying in the doorframe, then turn to face west, and you should be able to block the orbs from the Medusa statue and be safe from the tiles. If you haven't already, light the torches with the Lamp or Fire Rod to open the north door. Go through, and open the chest to get the compass.

Get the Big Key

Go south to the room where the tiles attacked you, and go through the door in the south wall. There are Sluggulas on the conveyor belt that sometimes drop bombs, so be careful to avoid them. If you want to kill the Wizzrobe, be sure not to stand in the path of the Yomo Medusa that spits fireballs when you swing your sword. Be warned that the Wizzrobe's beam will move west if it floats over the conveyor belt. Go east on the conveyor belt, then go north and pick up the northeast skull to get your magic refilled. Then go up the stairs in the northeast corner of the room.

If you kill the Wizzrobes in this room, they will just be replaced with new ones, so you might want to ignore them. There are two torches in this room, and another two torches in the room to the south. You will need to light all four, but before you can do so, you need to push the blocks out of the way. In the groups of three blocks, push the top and bottom ones to the side, then push the center one up or down. Go south and do the same thing with the blocks there, then use the Lamp to light the torches in both the north and south room. If you do so before any of them go out, the screen will shake. Afterward, go to the southern room if you aren't there already, then go through the east door to reach a room with a net floor and a hole south of some spike Traps. Fall into the hole.

Open the chest to get the Big Key, then go west to the next room. Step on the warp tile, then go north through the locked door. Step on the warp tile.

Get the Cane of Somaria

Go east, but don't go through the locked door yet. Instead, go through the door in the east wall. In the room with the net floor, go through the south door. You reach the room with the Stalfos, Beamos, and spikes in the floor. Go through the south door.

Go south to jump off of the ledge to the lower area. Go south and walk up the stairs, then go through the east door.

Quickly use the Hookshot on the block across the gap, then hold A to dash north up the narrow path. This will allow you to go past the Laser Eyes without getting hit. At the north end of the room, open the big chest to get the Cane of Somaria. You can use it to create an orange block that you can push and pull around, and you can also pick up and throw it. If you use the Cane of Somaria when there is already an orange block, the block will disappear and four fireballs will shoot out of where it was in each direction. Be aware that if you walk too far away from the block that you created, it will disappear. The Cane of Somaria uses magic, so watch your Magic Meter.

Reach the Dungeon Boss

Go through the door to the west of the big chest. Go north until you are in the room that has a net floor on the east side of the room, and jump down to the lower area. Go through the west door.

Go west and pick up a skull, then go up the stairs and go north through the locked door.

You can optionally go west to find a skull. Pick it up to find a large magic jar that will refill your magic. Then go east, then north along the wooden bridge, and go down the stairs in the north wall.

There are several Medusa statues in this room that will keep spitting orbs at you. Go to the northwest part of the room and pick up the skull there to find a floor switch. It won't stay down if you step on it, so use the Cane of Somaria to create an orange block and push it onto the switch to keep it pressed. A door will open in the southwest part of the room. Go to the southwest part of the room and go through the door there.

You reach a dark room that has a large block in the center. Ignore the block and go through the door in the west wall.

Go north in this room and you will find a spike Trap going from side to side. When it goes past, quickly go into the next narrow path before the Trap can hit you. Wait for it to go past again, and go down the third narrow path. Pick up the skull in the way and go to the south wall, then go to the southwest corner of the room. Go north from there and you will see a yellow Yomo Medusa and a conveyor belt. Go north until you can see a crystal switch to the north. Use your Boomerang or Hookshot to hit it, turning it orange.

You can optionally go counterclockwise around the conveyor belt while dodging the orbs that the Medusa statue spits at you, and drop a bomb at the cracked west wall, then go through the hole to find a room that contains 360 rupees, as well as a Bubble and a Medusa statue. If you went to the rupee room, go east to return to the conveyor belt room.

In the room with the conveyor belt and the crystal switch, go to the southwest part of the room and go through the door in the west wall there.

If the orange blocks are blocking the way, go back to the previous room and go north, and hit the crystal switch there, then return to this room. Go west, then use a bomb at the cracked north wall to open a hole, but be careful of the tiny Zoros that periodically scurry southward from the hole. Go through that hole, hit the crystal switch, and go south to the previous room, then go through the west door.

Watch out for Zols that fall from the ceiling. There is also a Rabbit Beam that tries to hit you, so try to make it hit a block instead. Go as far north as you can go in this room and hit the crystal switch to turn it orange. Then go around to the south side of the structure below the crystal switch and go up the stairs.

Quickly go east to avoid getting hit by the Winder that moves around the area. Be careful to avoid the Bubble as well. When the Winder is out of the way, go west to find the boss door. Go through.

Vitreous

Go to the southeast or southwest corner of the room. The small eyeballs will float toward you. Hit them with your sword to prevent them from hitting you. You can also hold the sword button to charge up a spin attack, which will hit multiple eyes at once. If Vitreous floats up above the slime, it will shoot lightning straight downward. You can stay in the corner to avoid this.

After you kill all of the smaller eyeballs, Vitreous will emerge from the slime and start bouncing toward you. Shoot it with arrows to do the most damage, or just hit it with your sword.

After it is defeated, take the Heart Container and crystal. There will be a cutscene, your health and magic will be refilled, and you will be sent outside.

If you have rescued the dwarven swordsmith and rescued the maidens in the Ice Palace and Misery Mire, there are some helpful upgrades that you can get now.