way to do that is with the fire rod. So light all four torches, starting
from to bottom and working your way up. Then leave the room before one of the lights goes out.
The next room may seem to be a dead end, but cut down the vines at the north wall and you'll find a hidden door. In the next room, defeat the enemies and you'll find a small key in the mummy. Open the locked door and proceed to the next room.
Lift one of the pots and carefully slip by the spike trap. Then drop into the hole and you'll fall right in front of this dungeon's boss: MOTHULA. Go down to the boss section of this FAQ for details. After you've defeated him, get the heart container and the third crystal. There are 4 more crystals to go.
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<<<<<<<<<<<<<<<<<<<< THE FOURTH CRYSTAL >>>>>>>>>>>>>>>>>
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Before you actually go for the 4th crystal, there's a few items you should get. If you already have these items, just skip to the next section.
-- GETTING ETHER --
Use the Magic Mirror to transport to the Light World. Then use the flute
and let the rooster bring you to map point #1 (Death Mountain). Climb all the way to the top of Death Mountain, just like you did when you were going to the Tower of Hera. Go to the left side of the Tower of Hera and cross that bridge to an island in the sky. Read the inscription
on the stone tablet with the help of the Book of Mudora. You'll hold up the Master Sword and recieve the power of Ether.
-- GETTING QUAKE --
Return to the Dark World. Go as far
reads "Curses to anyone who throws something into my circle of stones". There's a circle of stones in the water to the left. Let curiousity get the best of you: Throw something into that circle. Some kind of catfish creature comes out and gives you the power of Quake.